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單項(xiàng)選擇題

A long blast to warn the vessels（）vicinity.

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

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單項(xiàng)選擇題

CO₂ cylinder weighed（）normal weight.

A.light than
B.lighter
C.light
D.lighter than

單項(xiàng)選擇題

Vessel（）still to bunker 50 tones of fresh water.

A.have
B.have been
C.has been
D.has

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