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單項選擇題

（）persons who come on board to do their business.

A.Receive
B.Receiving
C.Received
D.receives

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單項選擇題

As a duty sailor, he should （）.

A. keep a gangway watch
B. often look around the ship
C. hoist and lower national flag on time
D. A+B+C

單項選擇題

The gangway is one meter higher,（） it, please.

A.lowing
B.lower
C.low
D.lowed