补充句子。选择合适的句子将对话补充完整(共5小题；每小题2分，满分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: