题目内容：

根据对话的情景，从方框中选择适当的句子填在画线处，使对话完整通顺.

A: Hello! May I speak to David, please?

B: This is David. Who’s that?

A:    1. 

B: Hello, Li Lei.    2. 

A: I’m doing my homework.

B: I think you are learning physics.

A: Yes. You’re right.    3. 

B: Because physics is your favourite subject.

A: David, we want to play soccer this afternoon.   4. 

B: Yes, I’d love to.   5. 

A: We want to meet on the playground at 1:00 p. m. See you then. Bye.

B: Bye-bye.

A. When and where will we meet? B. Why do you think so? C. Would you like to come with us? D. This is Li Lei. E. What are you doing?