题目内容：

从下面的方框中选择适当的句子填空，使对话完整。

A: May I come in?

B:   1.  Oh, it’s you, Li Ping. Show me your homework first.

A: Sorry, Mr. Wang. I was not at school yesterday.

B:   2.  

A: Something was wrong with my left leg.

B: I’m sorry to hear that.   3.  

A: Yes, it’s a little better.

B: You’d better finish your homework this evening.   4.  . It’s bad for your eyes. You can show it to me tomorrow. You must look after yourself and keep healthy.

A: Yes, Mr. Wang. I must finish my homework after school today.    5.