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It is common practice _____ a battery when it still has some life in it.

单选题
2022-06-23 23:47
A、to charge
B、charge
C、charged
D、having charged
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正确答案
A

试题解析

本题考查固定句型。句意:当电池还有一些电的时候进行充电是很普遍的行为。It is+名词短语+不定式为固定搭配句型,此外,本句中“it”是形式主语,真正的主语是动词不定式。故A项为正确答案。

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