动物的单词怎么写复数

　　例句：

　　Are animals able to think?

　　动物会思考吗？

　　The animals were penned up in cages.

　　这些动物被关在笼子里了。

　　Rhinos are largely sedentary animals.

　　大致说来，犀牛是一种定栖动物。

　　These animals only come out at night.

　　这些动物只在夜晚出来。