单项选择题
（）of mast paint shall we put on?
A. What coats B. How much coat C. How many coats D. Where coats
单项选择题 Finally, a wire brush should be used on all bare （）to remove the last of the scale.
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 （）.
