单项选择题
Look here, the paint is （）down.
A.run B.ran C.running D.runing
单项选择题 （）of mast paint shall we put on?
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.
