Definition: a large reptile with a long mouth and sharp teeth, that lives in lakes and rivers Level: B2
我们看到沼泽里有一条鳄鱼，所以决定不去游泳。
We saw a ___crocodile in the swamp, so we decided not to swim.
我的朋友开始走进水里，突然一条鳄鱼抓住了她的腿。
My friend started to walk into the water when suddenly a ___crocodile grabbed her leg.
鳄鱼是一种经常藏在河里的捕食者。
The ___crocodile is a predator that often hides in rivers.
