There is no light in the dormitory.They must have gone to the lecture, ? A.didn’t they B.don’t they C.mustn’t they D.haven’t they 简析:选D.在“must have done 结构中所引起的附加疑问句一般有两种形式.一种为“haven’t+主语 .另一种为“didn’t+主语 .但其主干句中必须有明确的过去时间状语.故应排除A.B.C. 查看更多

 

题目列表(包括答案和解析)

There is no light in the dormitory .They must have gone to the lecture,_____?(2004 上海春,31)

A.didn’t they    B.don’t they

C.mustn’t they     D.haven’t they

查看答案和解析>>


同步练习册答案