animal|animals

人类是唯一使用语言的动物吗？

Are humans the only ___animals to use language?

我认为人类是一种想要做有趣事情的动物。

I think the human is an ___animal that wants to do amusing things.

许多人认为海豚是聪明的动物。

Many people consider dolphins to be intelligent ___animals.