The sailor taking （）watch should do cleaning work on the bridge.

单项选择题The sailors do cleaning and repair work under the supervision of the （）.

A. chief officer
B. captain
C. bosun
D. second officer

单项选择题Cleaning is a constant job （）board a ship.

A.at
B.on
C.for
D.with

单项选择题Cleaning is a frequent （）on board a ship.

A.duty
B.responsibility
C.job
D.work

单项选择题Please return it after （）it.

A.use
B.used
C.using
D.to use

单项选择题The chief officer is responsible （）the overall maintenance of deck department.

A.for
B.to
C.with
D.of