在下列横线上填入适当的句子，补全对话。
A: Good morning, Doctor Li.
B: Good morning, Kangkang.     1    
A: I have a headache and cough day and night.
B:     2    
A: About 2 days.
B: Let me see. Oh, you have a cold.
A:     3    
B: Nothing serious.
A:     4    
B: Take some medicine and have a good rest. You’ll get better soon.
A:     5    Good bye!

A.What should I do? B.What’s wrong with you? C.Is it serious? D.Thank you. E.How long have you been like this?