Correct Answer: C

Rationale: The word 'staggered' is associated with unsteadiness or imbalance in movement. Stumbling is the most suitable synonym among the given choices to convey this meaning. 'Fell,' 'fumbled,' and 'pirouetted' do not accurately capture the idea of unsteadiness or imbalance conveyed by the word 'staggered.' 'Fell' generally means coming down from a standing position, 'fumbled' implies clumsiness or mishandling, and 'pirouetted' refers to a specific graceful ballet move, none of which align with the meaning of 'staggered.'

Correct Answer: A

Rationale: The correct answer is 'A: respect.' Rodney Dangerfield was famously known for his catchphrase 'I don't get no respect,' which perfectly aligns with the concept of respect being his motto. The other choices, 'B: sympathy,' 'C: attention,' and 'D: care,' do not accurately capture Dangerfield's well-known persona and catchphrase. Therefore, 'A: respect' is the most suitable answer.

Correct Answer: A

Rationale: The word 'labile' is used to describe something that is constantly changing or easily altered. Therefore, the best synonym for 'labile' is 'extremely changing.' Choice B, 'suicidal,' is incorrect as it does not relate to the meaning of 'labile.' Choice C, 'rapidly changing,' is close but not as precise as 'extremely changing.' Choice D, 'with a high fever,' is completely unrelated to the meaning of 'labile.'

Correct Answer: C

Rationale: The term 'etiology' refers to the cause or origins of a disease. In this context, the question is asking for the underlying reason or cause of the flu epidemic of 1918. Therefore, the correct answer is C. 'Etiology.' Choice A, 'Pathology,' is incorrect as it refers to the study of diseases rather than the cause itself. Choice B, 'Transmission,' is incorrect as it relates to how a disease spreads rather than its cause. Choice D, 'Mortality rate,' is incorrect as it refers to the number of deaths caused by a disease rather than the cause of the disease itself.

Correct Answer: A

Rationale: The word 'did' is correctly used in the sentence to form the past tense of the verb 'do.' In this context, 'did' is the appropriate term. The other words in the sentence, 'work,' 'asked,' and 'before,' are all used correctly and do not represent an incorrect word choice. Therefore, 'did' is the only word that is not used incorrectly in the given sentence.