We must （）to inspect the problems about the safety of fire prevention.

单项选择题When you keep a gangway watch, you should （）the mooring lines according to the rise and fall of the tide.

A.adjusted
B.adjusting
C.adjusts
D.adjust

单项选择题Lower gangway into place and （）safety net.

A.fast
B.make fast
C.fasten
D.fastened

单项选择题We should hoist national flag （）.

A. on time
B. in time
C. soon
D. at times

单项选择题We should often （）the bow and stern of a ship.

A.inspects
B.inspecting
C.inspect
D.inspected

单项选择题They will （）out a more detailed inspection.

A. carried
B. carrying
C. to carry
D. carry