--- Listen! David is talking happily with his mother in the next room. --- It ______ be his mother. She has gone to Yunnan to be a volunteer doctor.
#77427
A
should
B
must
C
can’t
D
mustn’t
推荐题目
-- Must I come here at eight o’clock? -No, you ____. You may come a little later.
#78344
A
mustn’t
B
needn’t
C
may not
D
can’t
—How dangerous it was!—Yes, but for the passer-by’s quick action, the girl ________.
#63100
A
was drowned
B
could have been drowned
C
had drowned
D
should be drowned
—Amy , I would like your uncle to help me repair the computer. —Sorry, he _____help you today . He won’t come back until tomorrow.
#74730
A
shouldn’t
B
may not
C
can’t
D
mustn’t