问题
选择题
— What about the protection?
— Let's keep the surface ________ dirt by putting a cover on it.[ ]
A. far from
B. free from
C. apart from
D. away from
答案
答案：B
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— What about the protection?
— Let's keep the surface ________ dirt by putting a cover on it.[ ]
A. far from
B. free from
C. apart from
D. away from
答案：B