问题
选择题
When to a certain temperature,water can be turned into steam.
A．heating
B．being heated
C．heated
D．to heat
答案
答案：C
前面部分可视为When it(water) is heated to...，意思是“被加热到……”。
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When to a certain temperature,water can be turned into steam.
A．heating
B．being heated
C．heated
D．to heat
答案：C
前面部分可视为When it(water) is heated to...，意思是“被加热到……”。