选择合适的句子将对话补充完整。(10分)
Jack: Hello, this is Jack!
Zhang Peng : This is Zhang Peng.                  
Jack: l am sorry. He is busy now. Please hold on.
Zhang Peng:             
Jack: He is writing an e-mail. He is coming.
Zhang Peng:  Hi, John!                
John: l go to the playground at 7 :00 in the morning.
Zhang Peng: lt is early.               
John: l get up at 6 :00.
Zhang Peng : Shall we meet at 6 :50 at school?
John:                 
A. Can I speak to John?
B: When do you go to the playground?
C. What is John doing?
D. OK. See you tomorrow morning.
E. When do you get up?