-Why,it's getting dark.-Yes,I'm afraid he__home alone.

问题描述:

-Why,it's getting dark.-Yes,I'm afraid he__home alone.
A.must have gone B.may go C.might have gone D.should have gone答案是c为什么?

是推测的,根据意思理解,‘很晚了,他‘可能已经’回家了’~
A:一定 B:没有用过去式 D:应该