My wife and I choose to live in the US,however,she____for a visa _英语解答

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：479 ℃　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