问题
选择题
The room is in a terrible mess, it _____ have been cleaned. [ ]
A. can't
B. mustn't
C. shouldn't
D. wouldn't
答案
答案:A
The room is in a terrible mess, it _____ have been cleaned. [ ]
A. can't
B. mustn't
C. shouldn't
D. wouldn't
答案:A