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英语
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Sugar,when___ with water,dissolves quickly.
A.mixed B.mixing C.mix D.is
答案应该选A.为什么不能选B?AB的区别是什么?说明原因,
人气：344 ℃ 时间：2019-12-13 09:37:52
解答
用ed分词形式表示被动,ing表示主动(这两种都是分词形式)
因为糖和水是被混在一起的,所以用ed表被动
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