My careless friend Bob received a ticket for speeding. He ____ have driven so fast.
#87755
A
can’t
B
wouldn’t
C
mustn’t   
D
shouldn’t
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What a pity. If I had caught that flight,  I ____ over the Pacific Ocean now.
#87518
A
would fly
B
would have flown
C
would be flying
D
were flying
—How did your mathematics exam go?—I thought I           ,but in fact I fell behind in the class.
#87779
A
should have been the top 10
B
could have been the top 10
C
may have been the top 10
D
need have been the top 10