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.
