阅读短文,根据内容，从所给的三个备选项中，选出最佳选项。

Hello, I'm Linda. It's warm and sunny today. We are having a school trip in the park. The girl in a red dress is Lucy. She is flying a kite. David is wearing a yellow cap. He is riding a bike. I am playing with my toy bear. Paul is playing ping-pong with Mary. Tim and Jack are playing football. What is Jim doing? He's riding a bike, too. Where is Miss Xu? She is looking at us and taking pictures.