我们用一段绳子把船系在柱子上。

We tied the boat to a post with a length of ___rope.

棚屋里有一卷绳子。

There was a coil of ___rope in the shed.

过了一会儿，她从背包里拿出一根绳子。

A few moments later she took out a ___rope from her backpack.