阅读短文，判断正误。

    It's fine today. Mr Green and his family are in the park. Mr and Mrs Green are standing under the trees 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 younger brother is too young. He can't walk and run. He's drinking milk. Ann's sister isn't in the park. She is at school.