问题补充:
单选题Asthemostacuteonein_______historyofallepidemics,theSpanishFluhad______tendencytostriketheyoungandfitratherthantheold.A.不填;theB.不填; aC.the; 不填D.the; a
答案:
D解析考察冠词。第一空用the特指all epidemics的历史;第二空是固定词组have a tendency to do sth有做某事的倾向。故D正确.
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