—I knocked but nobody answered the door. ----They _____asleep then and didn’t hear you.
#88169
A
must be
B
should be
C
must have been
D
should have been
推荐题目
He desired that he ______ the right to vote.
#87076
A
had
B
have
C
has
D
had had
Oh, Janne, you’ve broken another glass. You ought ____when you washed it. 
#89876
A
be careful
B
to care
C
have cared
D
to have been careful
I should not have laughed if I________you were serious.               
#86477
A
thought
B
would think
C
had thought
D
have thought