He was taken away by the police.He __a very serious crime.

分类: 作业答案 • 2021-12-20 13:03:51

问题描述：

He was taken away by the police.He __a very serious crime.
A.must be committed B.was being committedC.must commitD.must have committed

答

D求解释must have done sth一定做了什么事(表猜测事情在此之前已经发生)他被警察带走了，他一定是承认犯了严重的罪行。