根据对话内容，从方框的选项中选出5个最佳选项补全对话。其中有一项为多余选项。

A. Do you like having classes online? B. I want to buy a new computer. C. It seems that you haven't got enough sleep. D. What do you think of having classes online? E. How long have you been like this? F. Have you ever talked about it with your parents?

A: Hi, Jenny! May I ask you a question?

B: Yes, of course, Bill.

A:

B: It is interesting and convenient (方便的). I've had online classes for two years.

A: Really? I began to have online classes just three months ago.

B:

A: No, I don't. I feel bad and have a headache.

B: I'm sorry to hear that.  

A: Since the first day I had an online class.

B:  

A: No, I haven't.

B:  You'd better go to bed early.

A: OK. Thanks for your advice.