听力原文：M: What are you looking for, Alice？W: I'm looking for my pen, Mike. I can't see m

听力原文：M: What are you looking for, Alice？

W: I'm looking for my pen, Mike. I can't see my pen.

M: It's here, on the desk.

W: I'm sorry. But I'm getting so nearsighted. I'm afraid I have to wear glasses.

M: Your eyesight used to be very good, why？

W: Recently I have formed the habit of reading in bed. Sometimes I read on the moving bus.

M: Alice, you should pay attention to the care of your eyes. You should get rid of the bad reading habit. What's more, you should relax your eyes as often as possible.

W: Thank you, Mike.

What is the possible relationship 'between the two speakers？

A．Classmates.

B．Doctor and patient.

C．Teacher and student.