单项选择题
A.met B.meet C.meeting D.meets
（）is the captain?A.WhichB.WhatC.WhereD.How
单项选择题（）is the captain?
A.Which B.What C.Where D.How
（）persons who come on board to do their business.A.Rece...
单项选择题（）persons who come on board to do their business.
A.Receive B.Receiving C.Received D.receives
As a duty sailor, he should （）.A. keep a gangway watchB...
单项选择题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
