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The thick smog covered the whole city.It was as if a great black blanket ______ over it.
A.had been thrown B.were thrown
C.be thrown D.had thrown
主语说的不是现在的事实吗?不理解为什么要用到过去完成时.
人气:143 ℃ 时间:2020-05-19 06:51:27
解答
as if 表示“好像”的意思,需要用虚拟
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