My brother is 13 years old。 I like him very much。 He is funny。 He often tells jokes make me laugh。 He often exercises， but he eats too much meat and junk food， so he is kind of unhealthy。 His favorite subjects are math and P。E。， but his English grades are terrible。 He don not like reading。 He is more athletic and more outgoing， so he is very popular in his class。