單項(xiàng)選擇題（） in the engine room, the motormen could hardly talk each other.
A.To work
B.Working
C.Having worked
D.worked
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1.單項(xiàng)選擇題Upon arrival at a port, a vessel is not allowed （） her ballast water, tanker washings or bilge water and other oily water at will.
A.to discharge
B.to be discharged
C.discharging
D.being discharged
2.單項(xiàng)選擇題We prefer all the spare parts （） on board before departure.
A.to send
B.to be sent
C.for being sent
D.being to send
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