Ropes can be divided into （）basic types.

单项选择题It is very important for every sailor （）the characteristics of the ropes so that they can be for right jobs.

A.knowing
B.know
C.to know
D.knew

单项选择题This windlass （）now.

A. has repaired
B. is under repair
C. was repaired
D. had repaired

单项选择题The blocks and gooseneck of the jumbo need （）.

A. dismantling and inspecting
B. dismantled and inspected
C. to dismantle and inspect
D. dismantle and inspect

单项选择题One （）of the pilot ladder has been damaged. Please repair it at once.

A.step
B.shackle
C.chain
D.cable

单项选择题I need some sail maker’s tools to （）the broken hatch tarpaulin.

A.repair
B.mend
C.cover
D.clean