______ Tom be in his office so late at night ?
#74672
A
Can
B
May
C
Might
D
Must
推荐题目
Our playground is not so tidy and beautiful as before, students must ____ dirty things on it.  
#74989
A
be stopped to throw
B
be stopped throwing
C
stop to throw
D
stop from throwing
You _____ her in her office last Friday, she’s been out of town for two weeks.
#62649
A
needn’t have seen
B
must have seen
C
might have seen
D
can’t have seen