那辆旧自行车有一条生锈的链条。

The old bicycle had a ___rusty chain.

在雨中多年后，铁门变得完全生锈了。

After years in the rain, the iron gate became completely ___rusty.

你得小心那把生锈的旧工具；它可能会断裂。

You need to be careful with that ___rusty old tool; it might break.