第1题
A: than
B: when
C: before
D: then
第2题
A.set up
B.set about
C.taken off
D.taken up
第3题
A: hundred
B: hundreds
C: hundred of
D: hundreds of
第4题
A.had been cancelled
B.had cancelled
C.has been cancelled
D.cancelled
第5题
A.cancelled
B.had cancelled
C.has been cancelled
D.had been cancelled
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