单项选择题
Finally, a wire brush should be used on all bare （）to remove the last of the scale.
A.metal B.wood C.cement D.all the above
单项选择题 The （）plates should be scraped and brushed to bare metal.
单项选择题 The rusty plates should be wiped clean before paint is （）.
单项选择题 Before an area can be repainted, preparation is （）.
