给下列句子选择适当的答语。(每个选项只能选一次) A. No, thank you. B. It is dancing. C. They are drinking milk. D. They are doing tai ji quan. E. Of course. 1.What are Tom and Sam doing? (_____) 2.Can you go to buy some food? (_____) 3.Do you want some juice? (_____) 4.What are they drinking? (_____) 5.What is the horse doing? (_____)