"Superfluous" means excessive. We know from the first half of the sentence that John uses too much punctuation, so this is the correct choice. "Essential" and "exquisite" are both positive adjectives, so they don't work in this blank. "Flatulent" and "dissonant" simply don't make sense when describing commas.

The sentence reveals that it is difficult for a historian to construct a certain type of narrative because of the impact of bias; therefore, the word that goes in the blank must refer to the quality of being unbiased. "Dispassionate" means calmly objective or not influenced by personal feelings, so it is the best answer. As for the other answer choices, "whimsical" means quirky; "rhetorical" means relating to strategies of making language effective and persuasive; "verbose" means wordy; and "influential" means having influence or important.

The answer is "noxious" since the subject of the sentence got a stomachache after coming in contact with the "harmful and toxic" milk.

Lackluster is correct because it means dull or lacking in brilliance. We know from the first part of the sentence that the blank should contain a negative adjective, so feasible and lucrative don't work. Pretentious describes something or someone who wants to be regarded as impressive, and fastidious describes a person who is careful and meticulous. Neither describe a falling-apart performance.

Conspicuous is the correct answer because it means to stand out or be more visible. Enthused or fanatic are other adjectives that might fit wearing a bright pink bow, but the conspicuous contrasts well with how he "tried to blend in with the crowd."

Winsome is correct because it means attractive or handsome. We know it has to be something that is positive because it is paired with "charming." Brusque and volatile are both negative adjectives and can be eliminated.

Because of the "but" in the sentence, we know that the mother's opinion of the violence should contrast with Fred's. Since Fred liked it, the mother didn't, and the blank calls for a negative adjective. Gruesome and gratuitous are the options we have left. We can eliminate gruesome because it is not often that someone speaks "dismissively" of something that grosses them out. Gratuitous works best because it means uncalled for or unjustified.

Since this was her third surgery, the soccer player must be stubbornly persistent, or "tenacious" in returning to training once again after a difficult recovery.

"Ephemeral" works best here since a high is a temporary rush of euphoric emotions, which can only last so long before disappearing, making it temporary.

Because she had shared a room with her three sisters all her life, she was probably accustomed to a cramped and small living space. Thus, the dorm room must seem very large, or "capacious," to her.