问题
选择题
Some of the heat near the surface of the earth _____ electricity.
A．is used to making
B．are used for making
C．is used to make
D．are used to make
答案
答案：C
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Some of the heat near the surface of the earth _____ electricity.
A．is used to making
B．are used for making
C．is used to make
D．are used to make
答案：C