This question tests proper infinitive clause structure. The sentence begins with the infinitive phrase 'To finish the project on time,' which expresses purpose and needs to be followed by an independent clause. The original choice 'we worked late every night' correctly provides a complete independent clause with subject 'we' and verb 'worked.' Choice B creates a fragment with only a gerund phrase. Choices C and D use different tenses that don't match the context as well as the simple past tense. Infinitive phrases expressing purpose must be followed by complete independent clauses that show how the purpose was achieved.

This question tests the correction of comma splices in compound sentences. The underlined portion is a comma splice because it joins two independent clauses with only a comma, without a coordinating conjunction or proper punctuation. Each clause has its own subject and verb, making them complete thoughts that cannot be connected solely by a comma. Choice B fixes this by replacing the comma with a semicolon, which is appropriate for joining two closely related independent clauses. Choice A retains the splice, C creates a run-on with an improper participial phrase, and D adds an unnecessary comma after 'notebook' and misplaced 'later.' A key strategy is to remember that two independent clauses cannot be joined with only a comma; use a period, semicolon, or comma plus coordinating conjunction.

This is a comma splice question. Choice C (birds, and the birds won) is correct—adds coordinating conjunction "and" to properly join two independent clauses. Choice A (birds, it was the birds who won) creates comma splice—two independent clauses joined only by comma. Choice B (birds: the birds won) incorrectly uses colon in a dependent clause context. Choice D (birds, then the birds had won) still has comma splice—"then" isn't a coordinating conjunction. Pro tip: Use comma + FANBOYS to join independent clauses.

This is a parallel structure question. Choice A (NO CHANGE) is correct—maintains parallel verb forms: "slows down" (verb), "drops" (verb), and "repairs" (verb). All three use simple present active verbs in parallel series. Choice B breaks parallelism by mixing gerund ("slowing") with present tense ("drops"). Choice C restructures completely and breaks the list format. Choice D also breaks parallelism with gerund ("slowing"). Pro tip: Items in a series must have matching grammatical forms.

This is a comma splice/run-on sentence question. Choice B (glue; it) is correct—uses semicolon to properly join two independent clauses: "Fixing it requires more than just glue" and "it demands an understanding of physics, chemistry, and history." Choice A creates comma splice (two independent clauses joined only by comma). Choice C is also comma splice. Choice D creates run-on (no punctuation between clauses). Pro tip: Use semicolons to join closely related independent clauses.

This question tests parallel structure in a list of activities. The original phrase mixes gerunds ('playing,' 'watching') with an infinitive ('to travel'), creating faulty parallelism. Choice D corrects this by making all three items gerunds: 'playing basketball, watching movies, and traveling.' Choice C makes all items infinitives but would need to include 'to play' as well for complete parallelism. Choice B mixes a bare infinitive with gerunds. For parallel structure in lists, all items must use the same grammatical form throughout - all gerunds, all infinitives, or all nouns.

This question tests the proper use of correlative conjunction 'both...and.' The original sentence correctly uses this structure: 'The book is both inspirational and motivational.' The correlative conjunction 'both...and' creates a balanced, parallel structure connecting two adjectives that describe the book. Choice B creates a comma splice by separating independent clauses with only a comma. Choice C is unnecessarily wordy and repetitive. Choice D loses the emphasis provided by 'both...and.' Correlative conjunctions like 'both...and' effectively emphasize that two qualities are equally present and important.

This question tests the correction of a comma splice, where two independent clauses are incorrectly joined by only a comma. The original sentence has two independent clauses—'He wanted to replay the last clip' and 'he didn’t want to miss the speaker’s pause before the final line'—separated by a comma, which creates a run-on sentence. Using a semicolon properly joins the two closely related independent clauses without a conjunction. Choice D correctly uses a semicolon: 'He wanted to replay the last clip; he didn’t want to miss the speaker’s pause before the final line.' Choice A keeps the comma splice, Choice C adds an unnecessary comma at the end and uses 'and' improperly, and Choice B uses a colon incorrectly with an extra comma. A key strategy is to remember that two independent clauses can be joined with a semicolon, a period, or a comma plus a coordinating conjunction like 'and' or 'but.'

This question addresses comma splices between related independent clauses. The original sentence incorrectly joins 'The storm passed' and 'everyone emerged from their shelters' with only a comma. Choice D correctly adds the coordinating conjunction 'and' to show the sequence of events - first the storm passed, then people emerged. Choice C separates the clauses with a period, which is grammatically correct but loses the connection between the related events. Choice B uses 'so,' which implies causation rather than sequence. When two independent clauses describe related sequential events, a comma plus coordinating conjunction provides the best connection.

This question tests the correct use of correlative conjunctions. The sentence begins with 'Not only did she excel in academics,' which requires the correlative conjunction 'but also' to complete the parallel structure. The original choice 'but also in sports' correctly maintains this correlative relationship and uses ellipsis (omitting the repeated verb 'excel') for conciseness. Choice B adds an unnecessary pronoun and verb. Choice C removes 'also,' breaking the correlative conjunction pair. Choice D changes the conjunction entirely. Correlative conjunctions like 'not only...but also' must appear in pairs and maintain parallel structure between the elements they connect.