【题目】I clean my bedroom ________ about thirty minutes.
A. for B. of C. on
【答案】A
【解析】句意：我打扫卧室大约三十分钟。clean...for...为了，用了，选项A为了，用了，选项B的，选项C在.....上，故选A.
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I clean my bedroom about thirty minutes.A. for B. of C. on
编辑：chaxungu时间：2026-04-28 12:13:49分类：小学英语题库
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