The chemical works ______ where my father has orked for thir

The chemical works ______ where my father has orked for thirty years in 1949.
A.was built B.were built C.is built D.are built
请问选哪一个?
闪电迎接08 1年前 已收到1个回答 举报

鸡鸣人 幼苗

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选B
works是复数,in 1949表示是过去,所以选B

1年前

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