阅读理解，判断正误。

It's fine today. The sun is in the sky. Mr. Green and his family are in the park. Mr. and Mrs. Green are standing trader the tree and looking at their children. Ann is flying a kite. The boy in a white shirt and blue trousers is her brother. He's reading a book. Ann's little brother is too young. He can't walk or run. He's drinking milk. Ann's sister isn't in the park. She is at school.