这双跑鞋有耐用的橡胶鞋底，抓地力更好。

The running shoes have durable ___rubber soles for better grip.

动物园里的猴子们正开心地在旧橡胶轮胎上荡来荡去。

The monkeys at the zoo were swinging happily from old ___rubber tyres.

这些防水靴子是由坚固的橡胶制成的。

These waterproof boots are made of strong ___rubber.