When ______,ice will be changed into water, or even steam.A、heatedB、heatingC、t

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问题 When ______,ice will be changed into water, or even steam.

选项 A、heated
B、heating
C、to heat
D、be heating

答案 A

解析主语ice与动词heat构成被动关系，即“冰被加热”。故分词需用过去分词，表示被动。句意：冰块加热时会变成水甚至蒸汽。

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