问题

It was quite a long time ______ I figured outwhat had happened to the manager.
A:after
B:before
C:when
D:since
B:before
C:when
D:since
正确答案是:
同类题型
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You look tired, Miss Green.–yeah . Icomputergames for two hours.
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able parents, they never ______ to give their son what he is promised.
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