问题 补全对话,情景问答 看图填空。1. A: What are they _____________? B: They are _________________.2. A: Are they _________________? B: Yes, they are.3. A: _____________ your birthday? B: It's May 1st.4. A: What is John doing? B: He's _____________________. 答案 1. doing, playing chess 2. having a picnic 3. When is 4. catching butterflies