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單項(xiàng)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

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單項(xiàng)選擇題

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

A.control
B.controlling
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D.controls

單項(xiàng)選擇題

（）the raft.

A.Right
B.Re-right
C.Toright
D.Beright