（）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.

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.

A.rusty
B.tidy
C.dirty
D.cleaned

单项选择题The rusty plates should be wiped clean before paint is （）.

A.applied
B.supplied
C.placed
D.watered

单项选择题Before an area can be repainted, preparation is （）.

A.good
B.useless
C.necessary
D.bad

单项选择题Loose paint and scale are removed with （）.

A. a chipping hammer
B. a scraper
C. a lining brush
D. saw