填空题
A.tr
ai
l
B.cert
ai
n
C.ag
ai
n
D.f
ai
nt
【参考答案】
B
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______ you go there early, there won't be much a chance of getting a ticket.
A.Until
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C.Unless
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单项选择题
If there are any new words, ______ in a dictionary.
A.look them through
B.look them up
C.look them over
D.look them up and down
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