單項選擇題

Vessels ramaining（）a few hours should moor with anchors.

A.much than
B.more than
C.many than
D.lot than

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單項選擇題

Vessels should be manned（）duly qualified officers and crew adequate（）ensure the safety of navigation.

A.by/to
B.with/to
C.with/for
D.from/for

單項選擇題

VHF radio is one of the very important navigational instruments on board,（）messages can be sent.

A.by which
B.through which
C.by that
D.through that