单项选择题
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
Please return it after （）it.A.useB.usedC.usingD.to use
单项选择题Please return it after （）it.
A.use B.used C.using D.to use
The chief officer is responsible （）the overall maintena...
单项选择题The chief officer is responsible （）the overall maintenance of deck department.
A.for B.to C.with D.of
