刘海戏金蟾免费播放:求英语单选详解5

来源:百度文库 编辑:中科新闻网 时间:2024/05/03 11:40:06
There is no light or sound in the house. They must have gone to the cinema,( )?
A.didn't they B.don't they C.mudtn't they D.haven't they
用B还是用D?着重区分一下
要详解!!

此处 must表示肯定的推测,有没有时间状语,因此选择 B

B