I had Helen's brother _____ the windows, but Helen had them _____ instead.A．to clean； cleanedB．cleaned； cleanedC．cleaning； cleanedD．clean； cleaned-高中英语-魔方格

◎ 题干

I had Helen's brother _____ the windows, but Helen had them _____ instead.

A．to clean； cleaned

B．cleaned； cleaned

C．cleaning； cleaned

D．clean； cleaned

◎ 答案

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◎ 解析

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◎ 知识点

根据魔方格专家分析，试题“ I had Helen's brother _____ the windows, but Helen had them _____ instead.A．to clean； cleanedB．cleaned； cleanedC．cleaning； cleanedD．clean； cleaned…”主要考查了你对【现在分词的被动式】，【现在分词】，【不定式的被动式】，【过去分词】等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。

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