单项选择题
A. 0 to 4 B. 4 to 8 C. 8 to 12 D. 12 to 16
The sailors do cleaning and repair work under the super...
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
Cleaning is a constant job （）board a ship.A.atB.onC.for...
单项选择题Cleaning is a constant job （）board a ship.
A.at B.on C.for D.with
Cleaning is a frequent （）on board a ship.A.dutyB.respon...
单项选择题Cleaning is a frequent （）on board a ship.
A.duty B.responsibility C.job D.work
