The problem is too difficult for him. He _______ solve it by himself without any help.
#76048
A
can't
B
mustn't
C
shouldn't
D
needn't
推荐题目
-How was the English evening party last night?-It was great fun. You ______ come.
#76316
A
should
B
must
C
may
D
can
The man in the office ____be Mr. Black because he phoned me from London just now.
#75461
A
mustn’t
B
may not
C
can’t
D
needn’t
—Can we run across the road now?—No, we _ . We have to wait until the light turns green.
#75388
A
needn't
B
mustn't
C
couldn't
D
shouldn't
-- Who do you think _____ such a foolish thing?-- It _____ Tom, but I’m not sure.
#62680
A
could have done; may have been
B
could have done; must have been
C
should have done; may be
D
must have done; might have been
---Is Mr Hu in the reading room?---No, he _______be there. He has gone to Tianjin.
#75321
A
mustn’t
B
needn’t
C
won’t
D
can’t