问题
单项选择题
（）about 20 sq.m to be sand-blasted.
A.The rusting area
B.The rusted area
C.The corroded area
D.The corrosive area
答案
参考答案：B
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（）about 20 sq.m to be sand-blasted.
A.The rusting area
B.The rusted area
C.The corroded area
D.The corrosive area
参考答案：B