根据对话内容，从方框中选择恰当的句子将对话补充完整。

A. Did you see the doctor? B. Are you feeling better now? C. Was it serious? D. What was wrong with you? E. What did the doctor say?

A: Hi, Li Jun. You were not at school yesterday.     

B: Oh, I had a headache and I had to ask for a sick leave.

A: Sorry to hear that.     

B: Yes, my mother took me to the hospital.

A:   

B: The doctor checked me over and said I had a cold.

A:   

B: Yes, a little. The doctor told me to take the medicine three times a day and have plenty of water.

A:     

B: Yes, much better.  But I've missed so many lessons.

A: Don't worry about it. I'll help you later.

B: Thanks a lot.