—Oh my god! You__ wear slippers to attend the conference． —I'm sorry I forgot there is a conference．
#89857
A
must
B
can
C
should
D
shall
推荐题目
—You didn't wait for Mr. Smith last night, did you?—Yes, but we ________. He didn't return home at all.
#87275
A
don't have to
B
needn't have
C
didn't need to
D
should have
The workers demanded that their employer_____ their working conditions.
#86737
A
had improved
B
would improve
C
improve
D
will improve
---Why didn’t you reared him of the possible danger?---But what otherwise? He never listens to me.
#86877
A
could I do
B
could I have done
C
should I do
D
must I have done
It is required that no smoking ______ in the school.
#89784
A
was allowed
B
be allowed
C
would be allowed
D
had been allowed
Mark_______have hurried. After driving at top speed .he arrived half an hour early.
#88239
A
needn’t
B
wouldn’t
C
mustn’t
D
couldn’t