Mark’s cynicism is most likely displayed in his thoughts about the state of (and relative hopefulness for) other humans; therefore, the best word is “misanthrope.” This is derived from two Greek roots. The prefix, “mis-,” has many usages implying wrong, lacking, and other such words (e.g. “mistake,” “mistreat,” “misunderstand”). The second part is derived from anthropos, which means human person, and has related English derivatives in words like “anthropology” and “philanthropist.” Our word therefore means one lacking in respect for human beings or even, more strongly, one who hates humankind.

The correct answer is "magnanimous," meaning noble or courageous. The contextual clues of the sentence imply that the reaction was positive by the words "gracious" and "despite." This makes "magnanimous" the logical choice to finish the sentence.

The hermit actually is wise, though he denies it of himself. The best word is therefore “sagacity.” The word is derived from the Latin for “keen-sighted” or “perceptive” and is found in related English words like “sage.”

The key word here is “imprecision.” The “im-” prefix is privative, meaning not. Something "imprecise" is hazy or vague. While it might be tempting to think that the young man liked showing that people were stupid (i.e. "fatuous") or even "rustic" or "imprudent," the best option is the one most closely matching “imprecision,” and that option is “vague.”

While the plaintiff's backtracking makes him look bad, the sentence is structured in a way that makes the correct answer need to mean "truthful" or "believable." Therefore, rule out "frivolous," "underhanded," and "conniving" immediately. "Credible," which means believable, is the choice that works best in the sentence.

Although one might want to say that Daniel’s activity was commendatory or something else of the like, the best fit for the opposition in this sentence would be a word that captures the sense of being “not egoistic.” The word “altruistic” does this, for it means that one is selflessly concerned about the needs of others. Often one uses the nominal form “altruism” to describe the characteristic as well.

The key word in this sentence is "betrayed," which indicates that the man's demeanor was at odds with his inner fury. The correct answer will therefore have a sense of calm or quiet, the very definition of "placid."

The university's collection is now suspect because of the discovery of real documents. The way the sentence is framed indicates the correct answer is an antonym of "real." "Counterfeit," meaning fake or inauthentic, is the only antonym of real among the answer choices.

The words “vexed” and “caustic” coupled with the phrase “even more” indicate that the answer choice will reflect similarly negative speech. Only "abrasive" works in this context.

The structure of the sentence, and the employees' surprise, indicates the new manager was not easygoing. The correct answer choice will be the one that is an antonym of "easygoing." "Abrasive," meaning harsh and coarse, is the only such answer choice.