–Whose shirt is this?--It _______ be Li Lei’s. It is too big for him.
#78243
A
could
B
must
C
can’t
D
might
推荐题目
----I missed the first part of the film. It was really a pity.----You _____home half an hour earlier.
#62877
A
should have left 
B
must have left
C
should leave   
D
must leave
Today, we _____ work as hard as people did in the past.
#76507
A
mustn’t
B
can’t
C
shouldn’t
D
don’t have to