问题
选择题
Wind _______ electricity widely in many parts of the world.
A．is used to produce
B．is used to producing
C．used to produce
D．used to producing
答案
答案：A
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Wind _______ electricity widely in many parts of the world.
A．is used to produce
B．is used to producing
C．used to produce
D．used to producing
答案：A