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單項選擇題

When a ship is in port, the sailor on duty （）a gangway watch.

A.has
B.keeps
C.looks
D.takes

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單項選擇題

Hang national flag upside down should be strictly （）.

A.prohibit
B.prohibited
C.prohibiting
D.prohibits

單項選擇題

When you hoist national flag, you should hoist it（）.

A.quickly
B.rapidly
C.slowly
D.speedily

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