—Sorry，I can't go camping with you. I have to prepare well enough

　for the entrance exam.

—________！We can camp together next time.

A．Don't say so

B．Congratulations

C．Good luck

D．No problem

近视眼分类

A．轴性近视

B．弯曲性近视

C．指数性近视

D．进行性近视

E．高度近视