一Could you tell me what happed last night ?一I can't go into detail now because it _______ take too long. 
#89284
A
would
B
should
C
might
D
could
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Had he studied harder, he______the final exams.
#86510
A
would pass
B
could pass
C
had passed
D
would have passed
--Don't be so disappointed.I’m sure that you can do better in the next exam. --Yes, but I ____ this time.
#89035
A
should be more careful
B
could be more careful
C
should have been more careful
D
must have been more carefully