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When _______, water will be turned into steam.

更新时间:2024-11-16 09:48:24
A、heated
B、heating
C、beingheat
D、havingheated
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正确答案:

A

答案解析:

水被加热时会变成蒸汽。因为主句主语water和从句谓语heat的关系是被动的,所以用过去分词。

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