用恰当的词填空，完成对话，每空一词。

A: Good morning,doctor.

B: Good morning.What's the 1._____ with you,young man?

A: I can't see things clearly.

B: How long have you been 2._____ this?

A: For about two days.

B: Do you often watch TV?

A: Yes.Almost every day.

B: You know watching TV too much is 3._____ for your eyes.You must do more 4._____ exercises

    and mustn't watch TV too often.Your eyes will be 5. _____ soon.