Thisdamthe16thcentury;itwasbuiltthen.A.datesfromB.datedfromC.isdatedfromD.hasdatedfrom(explainwhy)

题目详情

This dam ____ the 16th century;it was built then.
A.dates from B.dated from C.is dated from D.has dated from
(explain why)

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答案和解析

C 后面有主语IT了,是个独立句子,因此前面应该也有谓语动词,AB排除
IT WAS BUILT THEN是个时间标志,因此不能用完成时.D排除.

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