一I heard that you got an A in the chemistry exam.Well done!一Thanks,I know that you     a good job as well.
#87426
A
shouId have done
B
need have done
C
must have done
D
could have done
推荐题目
--I'm told that John had another car accident this morning.--I believe not. He ________so careless.
#89318
A
shouldn't have been
B
wouldn't have been
C
couldn't have been
D
mustn't have been
You _____ pay your library fines. If not, you _____ not be allowed to graduate.
#90180
A
may; should
B
should; need
C
must; will
D
will; can