—My cat’s really fat.—You _____ have given her so much food.  (浙江2007) 
#87470
A
wouldn’t
B
couldn’t
C
shouldn’t
D
mustn’t
推荐题目
They must have been here the day before yesterday,____? 
#89896
A
mustn’t they
B
didn’t they
C
mustn’t have they
D
had they
——Are you content with her lecture?——Nowhere near that. It ____.
#89343
A
may have been good
B
couldn’t have been worse
C
can’t be better
D
must be better