看图，完成下列对话。

1. A: What are they doing? B: They're ___________________________. 2. A: What is ___________________________? B: She's _____________________________. 3. A: What ____________________________? B: They're __________________________. 4. A: What ____________________________? B: _________________________________.

1. playing chess
2. she doing, collecting leaves
3. are they doing, having English class (答案不唯一)
4. is she doing, She is writing a report