选内容补全对话/短文

A. He's watching TV. B. No, he isn't. C. What are you doing, John? D. Would you like to play ping-pong with me? E. May I speak to John?

Mike: Hello! This is Mike.

John: This is John speaking.

Mike:

John: I'm doing my homework.

Mike: What is your grandpa doing?

John:

Mike: Is your father watching TV, too?

John:

Mike: What's he doing?

John: He's reading a book.

Mike:  

John: Sure. See you later.

Mike: See you.