--- I was lucky to win a gold medal in the 800-meter-race. --- You __________ through tough training.
#63221
A
must go
B
should go
C
must have gone
D
should have gone
推荐题目
—May I swim here?  — No, you _______.  It is dangerous.
#75700
A
won’t
B
needn’t
C
mustn’t
D
don’t have to
---_____book is this? --- I think it _____ Carla’s. It has his name on it.
#76303
A
Who is, could be
B
Who’s, might belong to
C
Whose, must be
D
Whose, can’t belong to
As it turned out to be the most important meeting in the year, you ____ so casually. 
#62823
A
Shouldn’t dress up
B
shouldn’t have dressed up
C
needn't have dressed up
D
couldn’t dress up