问题补充：
--- Everybody is going to climb the mountain. Can I go too, mom?
--- Wait till you are old enough, dear.
A. Will you?
B. Why not?
C. I hope so.
D. I’m afraid not.
答案：
A. Will you?
B. Why not?
C. I hope so.
(答案→)D. I’m afraid not.
解析：句意：—每个人都去爬山。妈妈，我也去吗?——亲爱的，恐怕不行。等到你年龄大点，你再去。Will you？你愿意吗？ Why not? 为什么不？I hope so. 我希望如此。I’m afraid not. 恐怕不行。根据此空后的Wait till you are old enough可知孩子不能去，所以用委婉地拒绝，I’m afraid not.故选D。
