I____ asleep because it took me a long time to realize that the telephone was ringing.
#88031
A
could have fallen
B
should have fallen
C
must have fallen
D
mustn’t have fallen
推荐题目
If I___you, I____more attention to English idioms and phrases. 
#89906
A
was; shall pay
B
am; will pay
C
would be; would pay
D
were; would pay
Bob insisted that he ________ nothing wrong and ________ from work.
#87118
A
did; won’t be fired
B
had done; not be fired
C
should do; mustn’t be fired
D
do; shouldn’t be fired
 The plant is dead. I _____ it more water.
#90218
A
will give
B
would have given
C
must give
D
should have giv