My wife and I choose to live in the US,however,she____for a visa ahead of our move.
A.must apply B.need to apply C.may apply D.must have applied
答案应该选A,为什么?请说明原因,
人气：245 ℃ 时间：2019-09-23 15:03:35
解答
选A. 必须
B.need apply对的 不加to 情态动词
C. 可能 根据句意 错
D. must have done 对过去虚拟：一定做过.了
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