本文作者： 21ST
This year is the Year of the Dog. 狗年的主角当然是我们这些可爱的狗狗啦！How much do you know about us? The dog is the most popular pet in the world. 狗最大的特点就是忠实。And because of this, the dog is called "man's best friend"! There are 701 kinds of dogs in the world...