为什么好马不吃回头草？ 后面的草全吃没了
Why do the good horse refused to back the grass? Eat all the grass behind it
为什么大雁秋天要飞到南方去？ 如果走就太慢了
Why geese autumn to fly to south to? If go you is too slow
怎样使麻雀安静下来？答案：压它一下。 原因：鸦雀无声（压雀无声）
How to make a sparrow quiet?Pressure him, because in perfect silence