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英语
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May be they had to ( )for a long time,sometimes for hours.A.stops B.stopping C.stop D.to stop
但我不明白had to 后面不是要用动词原形吗,烦主告知具体原因.
人气：217 ℃ 时间：2019-12-12 02:50:17
解答
答案A错了,应选 C.stop
因为had to 后面要用动词原形
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