阅读短文，根据短文内容选择正确答案。
My name is Peter．I am 12．I have one brother and one sister．My brother is 15 and my sister is 9．I have a friend．He is an English boy．His name is Tanaka．He is in my class．I have a dog, too．Its name is Billy．Billy is 2．I like sports．I play basketball, soccer and volleyball after class（放学后）．I have one pencil case, two English books and three Chinese books．
