—Fire is very useful to human! —Yes, especially in winter a fire _____________warm.A．used to keepB．can be used to keep C．is used to keepingD．was used to keepin-初中英语-n多题

◎ 题干

—Fire is very useful to human!
—Yes, especially in winter a fire _____________warm.

A．used to keep	B．can be used to keep
C．is used to keeping	D．was used to keeping

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◎ 解析

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◎ 知识点

根据n多题专家分析，试题“ —Fire is very useful to human! —Yes, especially in winter a fire _____________warm.A．used to keepB．can be used to keep C．is used to keepingD．was used to keepin…”主要考查了你对【实义动词的单数第三人称形式】，【实义动词】，【动词短语】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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