--- I did not see your elder brother at the lecture yesterday.---You ______him, since he went to see Chinese Zodiac---Jackie Chan’s 100th movie.
#86948
A
mustn’t have seen
B
couldn’t have seen
C
shouldn’t have seen
D
needn’t have seen
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If you had not helped them, they ______ in London now.
#88341
A
would still be
B
will still be
C
would have still gone
D
will have still gone
 I would have come earlier, but I ________ that you were waiting for me. 
#89381
A
didn’t know
B
hadn’t know
C
would have known
D
haven’t known