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When the thunderstorm washed away the new bridge over the stream, all their work

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When the thunderstorm washed away the new bridge over the stream, all their work

When the thunderstorm washed away the new bridge over the stream, all their work of three months was ________.

A.in turn

B.in case

C.in vain

D.in trouble

试题答案

C

他们三个月的努力都白费了