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單項(xiàng)選擇題

Sailors should do mooring work when （） harbour.

A.entering
B.enter
C.toenter
D.entered

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單項(xiàng)選擇題

Shall I put the spring on this （）?

A.bit
B.bitt
C.biting
D.bite

單項(xiàng)選擇題

The sailors （）are making preparations for mooring.

A. on the bridge
B. at the stern
C. in the cabin
D. in the engine room