單項選擇題

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

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

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The ship’s bearing is 145°（）the lighthouse.

A.in
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單項選擇題

All vessels at mooring（）move to the sheltered anchorage.

A.must
B.have to
C.must be