They must have been here the day before yesterday,____? 
#89896
A
mustn’t they
B
didn’t they
C
mustn’t have they
D
had they
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--Why are you so depressed, Lily? --- I lost the contest narrowly, or I _________ the award of $10,000.
#87033
A
had gained
B
would have gained
C
would gain
D
must have gained
---You _________to our Mom like that. It was awfully impolite. ---You are right. I must have been crazy at that moment.
#87529
A
mustn’t have talked
B
needn’t have talked
C
shouldn’t have talked
D
may not have talked
--- Why is Jenny still standing there? It’s so cold.—She _____ for someone.
#90161
A
can wait
B
might have waited
C
must be waiting
D
should have waited