We are（） for PSC inspection.

单项选择题（）the line tight!

A.Keep
B.Make
C.Have
D.Take

单项选择题Put the（） on the lines.

A. rat guards
B. stopping guards
C. fenders
D. planks

单项选择题We should （）the national flag when the sun rises.

A.hoist
B.hoists
C.hoisting
D.hoisted

单项选择题The main tasks for sailors on duty are, first of all,（）the persons who come on board to do their business.

A.received
B.receives
C.receiving
D.receive

单项选择题Where are （）goods carried on board?

A.danger
B.dangerous
C.A+B
D.A or B