- Tom, where is your father?- I’m not sure. He _______ in his office.
#74723
A
must be
B
may be 
C
maybe
D
need be
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
The colour yellow______ the feeling of________.
#77339
A
makes;energy
B
creates;warmth
C
represents;purity
D
creates;harmony