----I failed again. I wish I _________ harder.---But you _________.
#86993
A
had worked; hadn’t
B
had worked; didn’t
C
worked; don’t 
D
worked; didn’t
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—You didn’t wait for Mr. Black last night, did you?  —No, but we ____. He didn’t return home at all. 
#89202
A
couldn’t have
B
needn’t have
C
didn’t need to
D
should wait have
If we    a table earlier, we couldn’t be standing here in a queue.
#86871
A
have booked
B
booked
C
book
D
had booked