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單項選擇題

We are loading dangerous cargo, no （）, please.

A.smoke
B.smoked
C.smoking
D.to smoke

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單項選擇題

If there is a fire on board, inform the bridge and give the （）at once.

A.sound
B.sounding
C.alarm
D.signal

單項選擇題

Cast sea anchor to （）the speed of drifting raft.

A.control
B.controlling
C.controlled
D.controls