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