The electronic engineer has come on board to （）you.

单项选择题（）is the captain?

A.Which
B.What
C.Where
D.How

单项选择题（）persons who come on board to do their business.

A.Receive
B.Receiving
C.Received
D.receives

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

单项选择题The gangway is one meter higher,（） it, please.

A.lowing
B.lower
C.low
D.lowed

单项选择题The gangway is one meter lower, （）it please.

A.hinging
B.high
C.higher
D.highly