单项选择题
A. rat guards B. stopping guards C. fenders D. planks
We should （）the national flag when the sun rises.A.hois...
单项选择题We should （）the national flag when the sun rises.
A.hoist B.hoists C.hoisting D.hoisted
The main tasks for sailors on duty are, first of all,（）...
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
Where are （）goods carried on board?A.dangerB.dangerousC...
单项选择题Where are （）goods carried on board?
A.danger B.dangerous C.A+B D.A or B
