(2013·安徽高考)It ________ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
#62392
A
may
B
couldn't
C
should
D
needn't
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The weather turned out to be fine yesterday. I ________the trouble to carry my umbrella with me. 
#63252
A
should have taken
B
could have taken
C
mustn't have taken
D
needn't have taken
Eddie _________ sleeping __________ going out.
#76114
A
would rather; than
B
prefers; than
C
would rather; to
D
prefers; to