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
It ______ heavily when he got back home for he was wet all over.
#87955
A
was raining
B
must have been raining
C
must be raining
D
rained
If I ______ten years younger, I _____ very happy.
#86935
A
am, would be
B
am, shall be
C
were, shall be
D
were, would be