A. take place B. take over C. take measures D. take up
单项选择题When we hoist national flag together with other flags, we should keep the national flag in the ()place.
A.centre B.lower C.A+B D.A o rB
单项选择题We can’t hoist ()national flag.
A.clean B.worn C.beautiful D.good
单项选择题The sailors should show the relevant ()by day.
A.ladders B.flags C.hands D.lines
单项选择题You should ()the mooring lines according to the changes of draft.
A.adjusted B.adjusting C.adjustment D.adjust
单项选择题Pay more attention to the rising and falling of ().
A.tide B.water C.sea D.wave