单项选择题
When we stow nylon rope, we can （）.
A. stow it in strong sunlight B. cover it with tarpaulins C. keep it on a reel D. keep it by itself
单项选择题 Ropes should be kept （）.
单项选择题 It is more economical to use （）, because of their greater strength and longer useful lives.正确答案A
单项选择题 Natural fiber rope is made （）the fibers of different plants.
