阅读短文，选择正确的答案

    It's Saturday today. My mother and I go to the park. There are (有) many(许多) people (人) in the park. Look, a girl is reading a book under the tree. Two boys are playing ping pong. A grandfather is sitting(坐) on a chair. Is he reading? No, he's sleeping. I'm thirsty. My mother buys(买) me an ice cream. Now, I'm eating an ice cream.