Everybody knows that coal_________-- electricity for agriculture and industry
问题描述：
Everybody knows that coal_________-- electricity for agriculture and industry
A is used to produce
B used to produce
C is used to producing
D used for producing
答
A
be used to do 什么被用来干什么
be used to doing 习惯于干什么
used to be 过去常常干什么
be used for 什么被使用为了什么