单项选择题
---Stand by engine! ---Stand by engine!（）
A. Engine stand by! B. Finished with engine! C. Engine by stand! D.OK.
单项选择题 Who is the head of the deck department?（）
单项选择题 The person who is in overall command of a ship is （）.
单项选择题 Who is the head of a ship? （）
