单项选择题
Nylon rope is the strongest and most elastic of all the （）ropes.
A. synthetic fiber B. natural fiber C. wire D. wooden
单项选择题 Hemp rope rots easily when it is wet. So it is now used only for “small stuff” such as （）.
单项选择题 （）doesn’t shrink or swell after contact with water.
单项选择题 Sisal rope is （）than manila rope.
