问题
选择题
I don't think that good books are difficult to find ______ how to live a low-carbon life.
[ ]
A. for
B. to
C. on
D. in
答案
答案：C
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I don't think that good books are difficult to find ______ how to live a low-carbon life.
[ ]
A. for
B. to
C. on
D. in
答案：C