问题 选择题

The H1N1 flu spread very quickly at the beginning, __________, many people were ill.

A.therefore

B.instead

C.in advance

D.however

答案

答案:A

考查词义辨析。Therefore 因此,instead 代替,in advance 提前,however

然而,句意:H1N1病毒在开始传播的非常快,因此,许多人病了。所以选A。

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