（）can give a hard-wearing surface and the required color.

单项选择题Undercoats are used （）the primer before the topcoat.

A.in
B.over
C.to
D.with

单项选择题Primer coats are applied to a bare metal surface to （）protection against rust.

A.let
B.give
C.prevent
D.take

单项选择题Primer coats are applied to a bare metal surface to give protection against （）.

A.rust
B.dirt
C.dust
D.air

单项选择题（）is used in bilges and peak tanks.

A.Bitumen
B.Paint
C.Cement wash
D.Varnish

单项选择题（）is the eye of the ship.

A.Engine room
B.Bridge
C.Deck
D.Compass