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單項(xiàng)選擇題

Cleaning is a frequent （）on board a ship.

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

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單項(xiàng)選擇題

Please return it after （）it.

A.use
B.used
C.using
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單項(xiàng)選擇題

The chief officer is responsible （）the overall maintenance of deck department.

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