He _____ without saying good-bye to them, for he always has good manners.
#90153
A
mustn’t have left
B
may not leave
C
shouldn’t have left
D
can’t have left
推荐题目
 “Did Jim come?” “I don’t know. He _______ while I was out.”
#89540
A
might have come
B
might come
C
mush have come
D
should have come
The rule demands that everyone ______ quiet in the school library.
#86874
A
keeps
B
keep
C
will keep
D
should be kept
Should it rain, the crops _____ . 
#87153
A
would be saved
B
would have been saved
C
will be saved
D
had been saved