这个镇上的粮仓雇了一名捕鼠人，专门对付老鼠问题。

The town's granary hired a ___ratter to deal with the rat infestation.

那只猫是个出色的捕鼠能手，经常在谷仓里抓老鼠。

That cat is a great ___ratter, often catching mice in the barn.

他们发现他是告密者后，就不再信任他了。

After they found out he was a ___ratter, they stopped trusting him.