猜一猜:How do you make a slow horse fast?

What has aneck but no throat?
What has an eye,but cannot see?
What is the best and cheapest light?
并翻译一下

怎么使一匹马跑得快？
和一匹跑得更慢的马比

什么东西有脖子没喉咙？

什么东西有眼看不见？

什么光最好又最便宜？
阳光

Don't give him anything to eat for a while. fast在谜题里不是”快”的意思，而是”禁食”的意思． 这样谜题就是：你怎样让一匹慢马禁食？ 答案当然就是：有段时间不让他吃任何东西啦。