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單項(xiàng)選擇題

The expression “Drop anchor” means “（）”.

A. Hold anchor
B. Let go anchor
C. Weigh anchor
D. Anchor aweigh

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According to the report, the ship hit the wharf when （）.

A.moor
B.berthing
C.berth
D.berthed

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Keep clear of the （）!

A.boy
B.bitt
C.buoy
D.bollard