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單項(xiàng)選擇題

Traffic lanes（）on this chart are recommended for use by all vessels.

A.show
B.showed
C.showing
D.shown

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單項(xiàng)選擇題

Vessels must navigate（）caution in this area.

A.in
B.by
C.on
D.with

單項(xiàng)選擇題

We have finished（）and are ready for sailing.

A.load
B.loading
C.will load
D.to load

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