單項(xiàng)選擇題

The sailors do cleaning and repair work under the supervision of the （）.

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

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單項(xiàng)選擇題

Cleaning is a constant job （）board a ship.

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

單項(xiàng)選擇題

Cleaning is a frequent （）on board a ship.

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