The doctors are doing all that they _____, but the old man is still not breathing properly.
#62988
A
shall
B
need
C
may
D
can
推荐题目
I ______ worry about my weekend—I always have my plans ready before it comes.
#63621
A
can’t
B
mustn’t
C
daren’t
D
needn’t
—Why didn’t you come to Simon’s party last night?—I wanted to, but my mom simply _____ not let me out so late at night.
#63622
A
ould
B
might
C
would
D
should
—_______ I take the newspaper away, please ?—No, you mustn’t. You _______ only read it here.
#75915
A
Must; can
B
May; can
C
need; must
D
Must; must
You keep quiet in the library because everyone is reading here.
#75771
A
may
B
should
C
mustn’t
D
needn’t