Spanish 2 Quiz: Gustar Type Structures
15 questions · exam conditions
0:00
Gustar Type StructuresQuestion 1 of 15

A Spanish instructor marks the following student sentence as incorrect: 'A Elena y a mí nos gusta mucho los viajes largos en tren.' The student argues the sentence is fine because 'nos' correctly refers to two people. Which response best evaluates the student's argument?

The student is correct. The indirect object pronoun 'nos' is the only element that must agree with the subject of a gustar-type verb, so as long as 'nos' is accurate, the rest of the sentence is grammatical.
The student is incorrect, and the error lies in the prepositional phrase: 'a Elena y a mí' is grammatically redundant when 'nos' is already present, so removing it would fix the sentence without changing the verb form.
The student is incorrect, and the error is actually in the pronoun: 'nos' is only used for nosotros as a direct object, so the correct indirect object pronoun for 'Elena y yo' in a gustar-type structure should be 'les.'
The student's argument is partially valid: 'nos' correctly reflects the two-person indirect object. However, 'gusta' is singular while the grammatical subject 'los viajes largos en tren' is plural, requiring 'gustan.' The error is in verb-subject agreement, not in the pronoun.
← Back to quizzes

Spanish 2 Quiz

Spanish 2 Quiz: Gustar Type Structures

Practice Gustar Type Structures in Spanish 2 with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Gustar Type Structures, giving you a quick way to practice the rules, question types, and explanations that matter most for Spanish 2.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

A Spanish instructor marks the following student sentence as incorrect: 'A Elena y a mí nos gusta mucho los viajes largos en tren.' The student argues the sentence is fine because 'nos' correctly refers to two people. Which response best evaluates the student's argument?

  1. The student is correct. The indirect object pronoun 'nos' is the only element that must agree with the subject of a gustar-type verb, so as long as 'nos' is accurate, the rest of the sentence is grammatical.
  2. The student is incorrect, and the error lies in the prepositional phrase: 'a Elena y a mí' is grammatically redundant when 'nos' is already present, so removing it would fix the sentence without changing the verb form.
  3. The student is incorrect, and the error is actually in the pronoun: 'nos' is only used for nosotros as a direct object, so the correct indirect object pronoun for 'Elena y yo' in a gustar-type structure should be 'les.'
  4. The student's argument is partially valid: 'nos' correctly reflects the two-person indirect object. However, 'gusta' is singular while the grammatical subject 'los viajes largos en tren' is plural, requiring 'gustan.' The error is in verb-subject agreement, not in the pronoun. (correct answer)
Explanation: When you encounter a sentence using a verb like gustar, you need to track two separate agreements: the indirect object pronoun (who likes something) and the verb form (which agrees with the grammatical subject — the thing being liked). Students often focus on one and miss the other. In the sentence 'A Elena y a mí nos gusta mucho los viajes largos en tren,' the student is right that nos correctly reflects two people — Elena and the speaker form a plural indirect object. However, the grammatical subject of gustar is los viajes largos en tren, which is plural. That means the verb must also be plural: gustan, not gusta. The corrected sentence is 'A Elena y a mí nos gustan mucho los viajes largos en tren.' That's why D is correct — the student's pronoun logic holds up, but the verb-subject agreement is the real error. A is wrong because verb-subject agreement is absolutely required regardless of whether the pronoun is correct — both must be accurate simultaneously. B is wrong because the prepositional phrase a Elena y a mí is not redundant; in gustar structures, it functions as a clarifier and emphasis for the indirect object pronoun, and removing it doesn't fix the actual verb error. C is wrong because nos is correctly used as an indirect object pronoun for nosotros — it's not limited to direct objects, and les would only apply if the people referred to were third parties (ella/él/ellos), not the speaker. Your study tip: always ask yourself two questions with gustar-type verbs — who is the indirect object (sets the pronoun), and what is the subject (sets the verb form). They're independent of each other.

Question 2

A student writes the following sentence: 'A usted le queda bien los pantalones negros y la chaqueta gris.' A knowledgeable speaker would identify this sentence as containing an error. What is the most precise description of the error?

  1. The indirect object pronoun 'le' is incorrect; it should be 'les' because 'usted' refers to multiple people in formal address.
  2. The prepositional phrase 'a usted' is unnecessary here because the indirect object pronoun 'le' already makes the reference to the listener clear without additional clarification.
  3. The verb 'queda' is in the singular form, but the sentence has two subjects ('los pantalones negros' and 'la chaqueta gris') joined by 'y,' so the verb must be 'quedan' to agree with the compound subject. (correct answer)
  4. The verb 'quedar' cannot be used as a gustar-type verb with clothing; the correct verb for expressing that clothing suits someone is 'sentar,' so the sentence should read 'a usted le sienta bien.'
Explanation: When you see a question about gustar-type verbs in Spanish, your first instinct should be to identify the true grammatical subject — because with these verbs, the subject is what the verb must agree with, not the person experiencing the action. In this sentence, quedar bien functions like gustar: the clothing items are the subject, and a usted le marks the person who benefits. Now look carefully — the sentence lists two items: los pantalones negros and la chaqueta gris. Two nouns joined by y form a compound subject, which is grammatically plural. That means the verb must be quedan, not queda. Writing queda (singular) when the subject is plural is a subject-verb agreement error — and that's exactly what makes C the correct answer. Choice A is wrong because le is the correct indirect object pronoun for usted (a singular formal address). Les would only be needed if referring to ustedes (plural). Choice B misidentifies the problem entirely — the prepositional phrase a usted is actually useful and common with gustar-type verbs to add clarity or emphasis, and omitting it would not fix any grammatical error. Choice D is a tempting distractor if you've heard of sentar bien, which is indeed used for clothing in some dialects, but quedar bien is widely accepted and grammatically correct for this purpose — the verb itself is not the problem. Your study tip: with gustar-type verbs, always scan the entire subject before choosing a verb form. A compound subject (X y Y) always demands a plural verb, even if each noun alone is singular.

Question 3

A student wants to express that the same activity — hiking in the mountains — is loved by her friends but makes her feel anxious. She writes: 'A mis amigos   escalar montañas, pero a mí   mucho.' Which pair of options correctly completes the sentence so that it is grammatically accurate AND conveys the intended meaning — that her friends love it and she feels anxious doing it?

  1. les encanta / me pone nerviosa (correct answer)
  2. les encantan / me pone nerviosa
  3. les encanta / me parece nerviosa
  4. les encanta / me aburre mucho
Explanation: When working with "gustar-type" verbs in Spanish, two things must always align: the indirect object pronoun must match who is experiencing the feeling, and the verb must agree in number with the grammatical subject (the thing being loved, feared, etc.). Keep both rules in mind simultaneously. Here, "escalar montañas" functions as a single infinitive phrase acting as the subject — and infinitives always take a singular verb form. So "les encanta" (singular) is correct for the friends' side, not "les encantan" (plural). The pronoun "les" correctly refers to "a mis amigos." For the speaker's side, you need a verb that conveys anxiety or nervousness. "Me pone nerviosa" means "it makes me nervous" — a perfect match for the intended meaning. This makes A the correct answer: "les encanta / me pone nerviosa." Now let's eliminate the distractors. B uses "les encantan," which incorrectly treats the infinitive phrase as a plural subject — a very common trap. C uses "me parece nerviosa," which means "it seems nervous to me," as if the mountain itself appears anxious — that's a meaning error, not just a grammar mistake. D uses "me aburre mucho," meaning "it bores me a lot," which fails the meaning test entirely: boredom ≠ anxiety. Study tip: With gustar-type verbs, always ask yourself two separate questions — "Who is the experiencer?" (→ choose the pronoun) and "What is the subject?" (→ determine singular or plural verb). Treating these as two distinct steps will prevent most errors on this topic.

Question 4

A ella le   las clases, pero no le   la tarea.

  1. gustan; gusta (correct answer)
  2. gusta; gustan
  3. gustan; gustan
  4. gusta; gusta
Explanation: With gustar, the verb agrees with the thing liked, not the person. Las clases is plural, so the first blank is gustan. La tarea is singular, so the second blank is gusta. The tempting mistake is using gusta for the first blank because 'me gusta' is common, but here the subject is plural las clases.

Question 5

¿Qué dices tú si te encanta la playa?

  1. Yo me encanta la playa.
  2. A yo me encanta la playa.
  3. A mí me encantan la playa.
  4. A mí me encanta la playa. (correct answer)
Explanation: With encantar, the thing loved is the subject, so the verb agrees with la playa (singular): encanta. The person is the indirect object: me, and a mí emphasizes who. The tempting wrong choice changes encanta to encantan, but that plural verb doesn't match the singular playa.

Question 6

Para decirle a María que a ella le gusta el cine, dices:

  1. Me gusta el cine.
  2. Te gusta el cine. (correct answer)
  3. Le gusta el cine.
  4. Nos gusta el cine.
Explanation: To say it to María herself, use the tú form with gustar: Te gusta el cine means You like movies. The tempting Le gusta el cine would mean She likes movies, which describes María to someone else, not what you say to her.

Question 7

Laura dice que a ella le interesan las ciencias. ¿Qué dice Laura?

  1. Te interesan las ciencias.
  2. Le interesan las ciencias.
  3. Me interesan las ciencias. (correct answer)
  4. Me interesa las ciencias.
Explanation: Since Laura is talking about herself, the indirect object pronoun must be me, not le. The subject ciencias is plural, so the verb is interesan, not interesa. The tempting wrong form uses le, which would describe someone else, not what Laura says.

Question 8

Para decir que a tus padres les gusta viajar, di:

  1. Les gusta viajar. (correct answer)
  2. Les gustan viajar.
  3. Le gusta viajar.
  4. Nos gusta viajar.
Explanation: To talk about your parents liking to travel, use the pronoun 'les' for ellos/ellas. The verb is 'gusta' because the liked thing is the infinitive 'viajar', which is singular. The tempting wrong choice uses 'gustan' to match the plural 'les', but infinitives always take 'gusta'.

Question 9

Marta y su hermano Pablo hablan sobre sus clases este semestre. Marta dice: 'A mí me encantan las matemáticas, pero las ciencias me aburren muchísimo. Pablo, ¿y a ti?' Pablo responde: 'A mí me pasa lo contrario — las ciencias me fascinan, aunque los exámenes de química me ponen muy nervioso.'

Based on the passage, which sentence most accurately represents Pablo's feelings using gustar-type verbs?

  1. A Pablo le aburren las ciencias, pero le fascinan las matemáticas y le ponen nervioso los exámenes de química.
  2. A Pablo le fascinan las ciencias y le ponen nervioso los exámenes de química, pero las matemáticas no le interesan según el texto. (correct answer)
  3. A Pablo le fascina las ciencias y le ponen nervioso los exámenes de química, aunque las matemáticas también le gustan.
  4. A Pablo le encantan las ciencias y le aburren los exámenes de química, mientras que a Marta le fascinan las matemáticas.
Explanation: When tackling questions about gustar-type verbs, you need to do two things simultaneously: check the grammar of each sentence and verify its accuracy against the passage. A sentence can sound grammatically perfect but still misrepresent what a character said — or it can state the right facts but contain a verb agreement error. Looking at what Pablo actually says: the passage tells us the contrario of Marta's feelings. Marta loves math and is bored by science, so Pablo is fascinated by science. He also says chemistry exams make him nervous. Crucially, Pablo says nothing about math. Option B captures this precisely — it correctly states that science fascinates him and exams make him nervous, while honestly noting that the text simply doesn't address his feelings about math. That's the most accurate, complete, and grammatically sound summary. Here's why the other choices fail: A completely reverses Pablo's feelings, saying science bores him and math fascinates him — the exact opposite of the passage. C contains a subject-verb agreement error: "le fascina las ciencias" is wrong because las ciencias is plural, requiring le fascinan. Additionally, C invents the claim that Pablo also likes math, which isn't supported. D gets Pablo's feelings wrong (he's nervous about exams, not bored by them) and misrepresents Marta, who says math enchants her, not that she's fascinated by it — and it swaps their sentiments entirely. A useful study habit: when reviewing gustar-type verbs, always confirm that the subject (the thing causing the feeling) matches the verb form. Plural subjects need plural verbs — a common trap in multiple-choice questions on this exam.

Question 10

Un turista estadounidense habla con su guía en Madrid. El turista dice: 'Me encantan los museos aquí, pero me cuesta mucho entender el acento madrileño. ¿A usted también le pasa?' La guía responde: 'Jajaja, a mí me encantaba el acento de mi ciudad cuando era niña, pero ahora ya me parece completamente normal. Lo que sí me sigue pareciendo curioso es el acento de los turistas.'

The guide's response contains two gustar-type verbs used in different tenses. Which option correctly identifies both verbs and their tenses as used in her response?

  1. 'Me encantaba' is the imperfect tense of 'encantar,' and 'me parece' is the present tense of 'parecer'; the guide uses the imperfect to describe a past habitual feeling and the present to describe her current perception. (correct answer)
  2. 'Me encantaba' is the preterite tense of 'encantar,' describing a completed past event, and 'me parece' is the present tense of 'parecer,' describing a current and ongoing opinion about the accent.
  3. 'Me encantaba' is the imperfect tense of 'encantar,' and 'me sigue pareciendo' is a present progressive construction; both describe simultaneous actions happening at the same moment in the present.
  4. 'Me encantaba' is the conditional tense of 'encantar,' expressing a hypothetical past preference, and 'me parece' is the present tense of 'parecer,' expressing her current neutral stance toward the accent.
Explanation: When analyzing gustar-type verbs like encantar and parecer, you need to identify both the verb tense and what it communicates about time. These verbs follow an indirect object pronoun structure (me, te, le, etc.) and express reactions or opinions, so their tenses carry important meaning about when that feeling exists. In the guide's response, me encantaba uses the imperfect tense of encantar. The imperfect (-aba/-ía endings) describes habitual or ongoing states in the past — and that's exactly what's happening here: she's describing how she used to feel as a child, a continuous past sentiment, not a single completed moment. Meanwhile, me parece is straightforward present tense of parecer, describing her current perception that the accent now feels completely normal. This combination — imperfect for past habit, present for current reality — makes A the correct answer. B is wrong because it misidentifies encantaba as preterite. The preterite would be me encantó, used for a completed, one-time event. The -aba ending is a clear imperfect marker. C incorrectly claims both verbs describe simultaneous present actions — me encantaba is clearly past tense, and me sigue pareciendo (a present progressive with seguir) describes a continuing present curiosity, not something happening at the same moment as a past feeling. D is wrong because the conditional of encantar would be me encantaría — encantaba has no conditional meaning whatsoever. A reliable tip: memorize the imperfect endings (-aba, -abas, -aba for -AR verbs) so you never confuse them with preterite or conditional forms — this distinction appears frequently in Spanish 2 assessments.

Question 11

A student wants to say: 'My cousins are bothered by loud music, but my grandmother loves it.' Which of the following correctly expresses this idea using gustar-type verbs?

  1. A mis primos les molesta la música alta, pero a mi abuela le encanta la música alta. (correct answer)
  2. A mis primos les molestan la música alta, pero a mi abuela le encantan la música alta.
  3. A mis primos les molesta la música alta, pero mi abuela le encanta mucho la música alta.
  4. Mis primos se molestan por la música alta, pero mi abuela encanta la música alta.
Explanation: When working with gustar-type verbs (like molestar and encantar), the key rule is that the verb agrees with the subject — which is the thing doing the bothering or pleasing — not the person experiencing it. The indirect object pronoun (me, te, le, nos, les) simply identifies who is affected. In this sentence, "la música alta" is the subject of both verbs. Since it's singular, both molesta and encanta must be singular as well. The indirect object pronouns les (for the cousins) and le (for the grandmother) correctly identify who is experiencing those feelings. Answer A nails all of this: singular verbs matching a singular subject, correct pronouns, and proper a + noun clarifiers for emphasis and clarity. Answer B fails because it uses molestan and encantan — plural verb forms — even though the subject (la música alta) is singular. This is a classic agreement trap. Answer C gets the verb agreement right but breaks the structure of a gustar-type construction by writing "mi abuela le encanta," which misplaces the indirect object pronoun and drops the required a before the noun (a mi abuela). It also awkwardly tacks on mucho after the noun. Answer D abandons the gustar framework entirely, using a reflexive construction (se molestan) and then writing "mi abuela encanta," which is completely ungrammatical — encantar always needs an indirect object pronoun. Your go-to tip: always ask yourself, "What is the subject of this gustar-type verb?" That noun controls conjugation, not the person feeling the emotion.

Question 12

En una encuesta universitaria, los estudiantes respondieron sobre sus hábitos. Claudia escribió: 'Me encanta cocinar los fines de semana y me relajan mucho los deportes acuáticos. Sin embargo, me cae muy mal madrugar entre semana.' Su compañero Rodrigo escribió: 'Me molesta el ruido cuando estudio, pero me interesan los debates filosóficos y me cae bien la profesora de ética.'

A classmate summarizes the survey responses as follows: 'Tanto a Claudia como a Rodrigo les cae bien alguien.' Is this summary accurate, and why?

  1. Yes, the summary is accurate because both Claudia and Rodrigo use 'caer' with a person as the subject, confirming that each has a positive reaction to someone.
  2. No, the summary is inaccurate because only Rodrigo expresses a positive reaction toward a person ('le cae bien la profesora'), while Claudia expresses a negative reaction toward an activity ('le cae muy mal madrugar'), not a person. (correct answer)
  3. No, the summary is inaccurate because 'caerle bien' is not a gustar-type verb and therefore cannot be used to express reactions toward people in this type of structure.
  4. Yes, the summary is accurate because Claudia's 'me cae muy mal madrugar' implies she has a positive feeling toward people who do not make her wake up early, which mirrors Rodrigo's positive reaction.
Explanation: When analyzing survey summaries in Spanish, you need to carefully track who is reacting to what — especially with gustar-type verbs like caer bien/mal, where the grammatical subject is the thing being reacted to, not the person experiencing the reaction. In the passage, Rodrigo writes "me cae bien la profesora de ética" — here, la profesora is the subject, meaning Rodrigo has a positive feeling toward a specific person. This clearly fits the summary's claim. Claudia, however, writes "me cae muy mal madrugar" — here, madrugar (an infinitive/activity) is the subject, meaning Claudia has a negative reaction toward an activity, not a positive reaction toward a person. The summary claims both students react positively to someone, but only Rodrigo does. That makes B the correct answer. A is wrong because it misreads Claudia's sentence. Yes, she uses caer, but the subject is an activity (madrugar) and the reaction is negative (muy mal), not positive — two strikes against the summary's claim. C is wrong because it denies something true: caer bien/mal absolutely functions as a gustar-type verb and is commonly used with people as subjects, as Rodrigo's sentence demonstrates. D is wrong because it invents an implied meaning that simply isn't in the text — you can't read a negative reaction toward an activity as a hidden positive reaction toward people. As a study tip: with gustar-type verbs, always identify the grammatical subject (what follows the verb) and note whether it's a person or activity, and whether the verb signals a positive or negative reaction. These details are exactly what reading-comprehension questions test.

Question 13

En una conversación informal, Ana le dice a su amigo: 'Oye, ¿a ti te importan las opiniones de los demás?' Su amigo contesta: 'Honestamente, antes me importaban bastante, pero ya no. Ahora lo que me importa es ser fiel a mí mismo. Aunque tengo que admitir que todavía me importan las críticas de mi familia.'

The friend's response uses the verb 'importar' three times in different forms. Which analysis of those three uses is most linguistically precise?

  1. 'Me importaban' is imperfect plural agreeing with implied plural opinions; 'me importa' is present singular agreeing with the infinitive 'ser fiel a mí mismo'; 'me importan' is present plural agreeing with 'las críticas de mi familia.' All three show correct subject-verb agreement.
  2. 'Me importaban' is imperfect plural agreeing with 'las opiniones'; 'me importa' is present singular agreeing with 'ser fiel'; 'me importan' is present plural agreeing with 'las críticas.' However, 'me importa ser fiel a mí mismo' is non-standard because gustar-type verbs avoid infinitive subjects in formal contexts.
  3. 'Me importaban' is preterite plural referring to a completed past concern; 'me importa' is present singular for a general truth; 'me importan' is present plural for an ongoing concern. The shift from preterite to present marks a completed change in attitude.
  4. 'Me importaban' is imperfect plural agreeing with 'las opiniones de los demás' from context; 'me importa' is present singular agreeing with the noun clause introduced by 'lo que'; 'me importan' is present plural agreeing with 'las críticas de mi familia.' All three reflect correct gustar-type subject-verb agreement. (correct answer)
Explanation: When analyzing gustar-type verbs like importar, the key is identifying what serves as the grammatical subject — because the verb agrees with the subject, not with the person experiencing the feeling (which is the indirect object). In the friend's response, each use of importar has a different subject. Me importaban looks back to Ana's question about las opiniones de los demás — a plural noun phrase, which triggers plural imperfect agreement. Me importa responds to the infinitive phrase embedded in lo que me importa es ser fiel a mí mismo: here, lo que introduces a nominal clause functioning as a singular subject, hence singular present. Finally, me importan agrees with las críticas de mi familia, a plural noun phrase, giving you present plural. Answer D captures all three subjects correctly — including the crucial recognition that lo que creates a singular nominal subject, not that ser fiel alone is the subject. Answer A gets close but misidentifies the subject of me importa as the bare infinitive ser fiel, missing that lo que me importa is the full subject construction. Answer B compounds that same error and adds a false grammar rule — using infinitives as subjects with gustar-type verbs is perfectly standard in Spanish at all registers. Answer C misclassifies me importaban as preterite; the imperfect is correct here because the past concern was ongoing and habitual ("before, I used to care"), not a single completed event. Your study tip: always ask what is doing the importing, gustar-ing, or encanting — find the true subject first, then check verb agreement. That one habit will unlock most gustar-type questions.

Question 14

Which of the following sentences uses a gustar-type verb correctly to express a nuanced emotional or physical reaction, AND maintains proper subject-verb agreement throughout?

  1. A los niños les da asco los vegetales verdes, pero le encantan los dulces a cada uno de ellos.
  2. A mi hermana mayor le duele la espalda cuando levanta cajas pesadas y también le molestan los ruidos fuertes. (correct answer)
  3. A vosotros os apetecen una siesta larga después del partido de fútbol tan agotador.
  4. A él le fascina los museos de arte moderno, especialmente cuando incluyen instalaciones interactivas.
Explanation: Gustar-type verbs (like encantar, molestar, doler, fascinar, apetecer, dar asco) follow a special structure: the grammatical subject is the thing causing the reaction, and the person experiencing it is the indirect object. This means verb agreement follows the subject, not the person. Always ask yourself: what is causing the feeling? That noun determines whether you use singular or plural. Option B is correct because every element aligns perfectly. Le duele la espalda — singular verb, singular subject (la espalda). Le molestan los ruidos fuertes — plural verb, plural subject (los ruidos). The indirect object pronouns match a mi hermana mayor throughout, and both verbs express distinct physical and emotional reactions with natural nuance. Option A contains a subtle agreement error: le da asco los vegetales verdes uses a singular verb (da) with a plural subject (los vegetales). It should be les dan asco. The plural indirect object pronoun les is also missing before da. Option C has a clear mismatch: os apetecen una siesta larga pairs a plural verb (apetecen) with a singular subject (una siesta). It should be os apetece, since one nap is causing the feeling. Option D makes the same type of error: le fascina los museos uses a singular verb with a plural subject (los museos). The correct form is le fascinan. Your study tip: whenever you see a gustar-type verb, immediately identify the noun causing the reaction — that noun is your true subject, and your verb must agree with it, not with the person in the a + pronoun phrase.

Question 15

Which sentence contains a grammatical error in the use of a gustar-type verb?

  1. A los estudiantes les conviene estudiar antes del examen.
  2. A ti te hacen falta dos clases más para graduarte.
  3. A nosotros nos fascina las películas de terror más recientes. (correct answer)
  4. A mi jefe le disgustan las reuniones largas los viernes.
Explanation: When working with gustar-type verbs (like gustar, fascinar, disgustar, convenir, hacer falta), the golden rule is subject-verb agreement — the verb must agree with the grammatical subject, which is typically the noun after the verb, not the person referenced by the indirect object pronoun. In option C, "A nosotros nos fascina las películas de terror más recientes," the grammatical subject is las películas de terror más recientes, which is plural. This means the verb must also be plural: fascinan, not fascina. The nos tells you who is affected, but it does not control verb conjugation — las películas does. That mismatch makes C the sentence with the error. Options A, B, and D are all grammatically correct. In A, "les conviene estudiar" — the infinitive estudiar acts as a singular subject, so the singular conviene is correct. In B, "te hacen falta dos clases más" — dos clases is plural, so the plural hacen matches perfectly. In D, "le disgustan las reuniones largas" — las reuniones is plural, and disgustan is correctly plural as well. Notice how B and D are designed to look tricky: they use less common verbs (hacer falta, disgustar) hoping you'll get distracted. They're actually correct — the trap in C is more subtle because students often let nos mislead them into thinking the verb should match the pronoun. Study tip: With any gustar-type verb, ignore the pronoun and ask yourself, "What is doing the fascinating/disgusting/etc.?" That noun is your true subject — make the verb agree with it.