—Hi, Johnson, any idea where Susan is?—It's class time, so she       in the classroom now.
#63533
A
can be
B
must have been
C
might have been
D
should be
推荐题目
It was my fault. I ________you about the meeting earlier. 
#63052
A
should tell
B
should have told
C
had to tell
D
would have told
You look quite tired. You’d better _____a good rest.
#75778
A
stop to have
B
stop having
C
to stop to have
D
to stop having
-- My cat’s really fat. --- You ______ have given her so much food.
#63287
A
wouldn’t
B
couldn’t
C
shouldn’t
D
mustn’t
Teenagers _______ allowed to drive in the street.
#74366
A
should not be
B
should be not
C
not should be
D
shouldn’t