單項選擇題

When the anchor reaches the bottom ,hoist the anchor （）by day.

A.ball
B.flag
C.light
D.lamp

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單項選擇題

Letter “G” shows that“ （）”.

A. I have a pilot on board
B. I require a pilot.
C. I have stopped.
D. My vessel is healthy .

單項選擇題

Letter “H” means“（）”.

A. I have a pilot on board
B. I require a pilot
C. I have stopped
D. My vessel is healthy