Sam：3. ________
Amy：He's taking pictures. 4. ________
Sam：There's(有) an elephant. What is it doing?
Amy：5. ________
十三、读一读，用“√”勾出每个人正在做的事情。(10分)
We are at Zhongshan Park now. Fangfang and Lingling are playing chess. Tingting is doing taijiquan. Sam and Daming are not doing taijiquan. They're watching the animals. The bird is singing. The monkeys are drawing pictures. The elephant is playing with a ball.