问题
选择题
_______, water changed into steam.
A．Heated
B．Heating
C．Being heating
D．to heat
答案
答案：A
考查非谓语动词，句中逻辑主语与heat之间的关系为被动关系，故用过去分词，选A。
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_______, water changed into steam.
A．Heated
B．Heating
C．Being heating
D．to heat
答案：A
考查非谓语动词，句中逻辑主语与heat之间的关系为被动关系，故用过去分词，选A。