The contrast here is between obscurity and clarity. When something or someone is “lucid,” he or she is able to express ideas or thoughts in a clear manner. The word actually comes from base words for “light,” which are found in English relatives like “lucent,” “translucent,” and even “Lucifer” (the so-called “light bearing angel” who later fell from grace, according to Christian tradition).

We know that the actor missed some direction telling him to enter the scene, so we need to pick out an answer choice that means something like "signal." While "summons" might seem like the correct answer, "cue" fits the context of the sentence better; while "summons" means "an authoritative or urgent call to someone to be present or to do something" or "an order to appear before a judge or magistrate, or the writ containing it," "cue" means "a thing said or done that serves as a signal to an actor or other performer to enter or to begin their speech or performance." Because "cue" best fits the theatrical context of the sentence, "cue" is the correct answer.

The important thing to note in this sentence is that, in his experiment at least, the physicist is unconcerned with the question of the soul’s immortality. The question could be said to be “outside” of his concerns or irrelevant for his considerations. When something is called “extraneous” it is being described as being thus unrelated. The word comes from the Latin for “external” or “foreign.”

The contrast here is between obscurity and clarity. When something or someone is “lucid,” he or she is able to express ideas or thoughts in a clear manner. The word actually comes from base words for “light,” which are found in English relatives like “lucent,” “translucent,” and even “Lucifer” (the so-called “light bearing angel” who later fell from grace, according to Christian tradition).

Because two different professions are coming together to solve, the best choice is "collaborated," which means to work together.

The key expression here is “having little real content.” The words were therefore empty or “vacuous,” a word with clearly related terms like “vacuum” and “vacuity.”

The contrast expressed in this sentence is between the apple and the coffee shop, which is apparently behind the apple (as implied by “portrayed behind it \[the apple\]”). When something sits “in front” of other things so as to be very visible, it is said to be in the “foreground,” literally the “front ground” of the image, view, or painting.

We know that the mill makes flour by crushing wheat between two large stones, so we need to pick out an answer choice that means something like "crushing." While "flattening" might seem like a potentially correct answer, "pulverizing" is the better choice, as "pulverizing" means "reducing to fine particles" or, more informally, "defeat utterly." Because "pulverizing" best fits the context of the sentence, it is the correct answer.

The implication in this sentence is that the house was in more disrepair than even many other deteriorating houses in town. The best word to match this sense is “dilapidated,” which means “falling apart due to age or lack of care.” It is derived from the prefix “di-” meaning “apart or down from” and the Latin word for stone, “lapis.” The stone lapis lazuli is so named because it is the stone (lapis) from the place in Persia (now Iran) that was Latinized as Lazulus.

The contrast expressed in this sentence is between the apple and the coffee shop, which is apparently behind the apple (as implied by “portrayed behind it \[the apple\]”). When something sits “in front” of other things so as to be very visible, it is said to be in the “foreground,” literally the “front ground” of the image, view, or painting.