They demanded that the books________ to the school library at once. 
#86780
A
return
B
should return
C
be returned
D
would be returned
推荐题目
Had I got to the airport earlier, I _______ you.
#88100
A
might not miss to see
B
would not have missed seeing
C
should not miss seeing
D
would not have missed to see
Thank you for giving me a hand. I ______ in the experiment without your valuable help. 
#89288
A
have failed
B
will fail
C
would have failed
D
must have failed
The family _____ on time, but their car had a flat tyre on the halfway.
#86667
A
would arrive
B
could arrive
C
must have arrived
D
would have arrived