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
-----Where is my key? I remember I put it here yesterday.--------You ______ it in the wrong place.
#63592
A
must put
B
should have placed
C
might put
D
might have put
I went there in 1984, and that was the merely occasion when I ________ the journey in exactly two days.
#62744
A
must take
B
must have made
C
was able to make
D
could take
–What will the weather be like tomorrow? –It____ be rainy, cloudy or sunny. Who knows?
#74825
A
must
B
might
C
shall
D
should