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While the plane is taking of or landing,make sure your seat belt( ) A.fastens B.is fastened
句子里make sure是谓语为什么还能选B呢?
人气:422 ℃ 时间:2020-04-25 14:42:42
解答
make sure that 后面接从句
is fastened是从句里的谓语
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