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英语
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He spent two hours ()(do)his homework.
答案是doing. 而我写了did.为什么不是did呢?不是已经做了作业再说的吗,那就用过去式啊.我想不通诶,Help me!
人气：340 ℃ 时间：2020-04-09 21:10:28
解答
spend on sth1/doing sth2 前面的sth1是名词 后面的sth2是动词 只有这2种形式 其他的就不用考虑了
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