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
He suggested that we should _______ the instruction.
#86689
A
simple
B
simplify
C
simply
D
simplified
 —Why didn’t you attend the lecture yesterday?—I didn’t think that we _______ on Sundays.
#90145
A
should
B
ought to have
C
shouldn’t have
D
will have to
His homework______, but it _____.
#90163
A
needs correcting; needn’t rewriting
B
need be corrected; doesn’t need to be rewriting
C
needs correcting; needn’t be rewritten
D
needs to be corrected; needn’t to be rewritten