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
—Look! Is that Mr. Green?—It be Mr. Green. He has gone to Shanghai.
#75596
A
must
B
can
C
mustn’t
D
can’t
Teachers should ___them to continue studying when some students want to give it up.
#75047
A
encourage
B
keep
C
prevent
D
make
---I was told to be here at this time.---Sorry, you ___________. I forgot to tell you we've changed the plan.
#76828
A
must
B
may
C
can't
D
needn't