單項(xiàng)選擇題

What is the tide（）.

A.do
B.to do
C.doing
D.to doing

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單項(xiàng)選擇題

What method of extinguishing fire in a hatch is the best to minimize damages to the cargoes?（）.

A.Foam
B.CO₂
C.Water
D.All of the above

單項(xiàng)選擇題

When a pushing vessel and a vessel（）ahead are rigidly connected in a composite unit they shall be regarded as a power-driven vessel.

A.is pushed
B.being pushed
C.was pushed
D.be pushed