If you go into a store and feel that the clerk is being rude, stop and think that she____ a tough day, and put yourself in her shoes. 
#88069
A
may have
B
may have had
C
must have
D
should have had
推荐题目
--- I’m sorry.I ___________ at you the other day. --- Forget it.I was a bit out of control myself.
#87832
A
shouldn’t shout
B
shouldn’t have shouted
C
mustn’t shout
D
mustn’t have shouted
 — You _____ stop me.— Even if you _____ it, I won’t allow you to do it.
#89218
A
mustn’t…dare not do
B
may…dare not do
C
can…dare to do
D
needn’t…dare do
—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
But for the help of my English teacher, I ____  the first prize in the English Writing Competition. 
#90431
A
would not win
B
would not have won
C
would win
D
would have won