根据下面对话中的情境，在每个空白处填入一个适当的语句，使对话恢复完整。
A: Hi, Li Jun. You weren’t 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 see the doctor.
A:                             ?
B: The doctor said I had a cold.
A:                                ?
A: Yes, It was a little serious. The doctor told me to take the medicine three times a day and have plenty of water.
A:                              ?
B: I’m feeling much better now. But I’ve missed so many lessons.
A: Don’t worry about it. I’ll help you later.
B: Thanks a lot.