单项选择题
A.3 B.4 C.5 D.6
It is very important for every sailor （）the characteris...
单项选择题It is very important for every sailor （）the characteristics of the ropes so that they can be for right jobs.
A.knowing B.know C.to know D.knew
This windlass （）now.A. has repairedB. is under repairC....
单项选择题This windlass （）now.
A. has repaired B. is under repair C. was repaired D. had repaired
The blocks and gooseneck of the jumbo need （）.A. disman...
单项选择题The blocks and gooseneck of the jumbo need （）.
A. dismantling and inspecting B. dismantled and inspected C. to dismantle and inspect D. dismantle and inspect
