单项选择题
A.adjusted B.adjusting C.adjusts D.adjust
Lower gangway into place and （）safety net.A.fastB.make ...
单项选择题Lower gangway into place and （）safety net.
A.fast B.make fast C.fasten D.fastened
We should hoist national flag （）.A. on timeB. in timeC....
单项选择题We should hoist national flag （）.
A. on time B. in time C. soon D. at times
We should often （）the bow and stern of a ship.A.inspect...
单项选择题We should often （）the bow and stern of a ship.
A.inspects B.inspecting C.inspect D.inspected
