單項(xiàng)選擇題

We can’t hoist （）national flag.

A.clean
B.worn
C.beautiful
D.good

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單項(xiàng)選擇題

The sailors should show the relevant （）by day.

A.ladders
B.flags
C.hands
D.lines

單項(xiàng)選擇題

You should （）the mooring lines according to the changes of draft.

A.adjusted
B.adjusting
C.adjustment
D.adjust