22. how many sides does a circle have? key:Two，the inside and the outside
一个圆有几个面?脑筋急转弯答案：两面，里面和外面
23. what tree is always very sad? key:weeping willow
什么书树总是很伤心?答案：垂柳.谜语解析：weeping willow的意思是垂柳，weeping是哭，willow是柳树24. what is full when it's used and empty when it's at rest? key：a shoe
什么东西在使用它的时候是满的，在他休息的时候是空的。脑筋急转弯答案：鞋
25. when can you get water with a net? key:when water is turned into ice 什么时候你可以用用网拿到水呢？ 英语脑筋急转弯答案：当水变成冰的时候
26. why are people tired on April Fool's Day? key:Because they have just had a long March.
为什么在四月一日愚人节人们都很累？答案：因为他们刚度过了一个很长的三月(行军).march除了三月以外还有行军的意思。
27. what's the poorest bank in the world? key:the river bank
世界上最贫穷的银行是什么？答案：河岸。bank还有河岸的意思
28. what is heavier in summer than in winter? key：Traffic to the beach 什么东西夏天比冬天重?答案：去海滩的车流 解释：heavy除了重的意思，还有交通量大的，繁忙的意思。
29. what can pierce one's ears without a hole? key:Noise,voice
什么东西能穿透一个人的耳朵而不留下一个洞？答案：噪音，声音。
30. what's too much for two and just right for one? key:A secret
什么东西对两个人来说太多，一个人刚刚好? 答案：秘密，因为两个知道就是不是秘密了。
31. what tree letters turn a girl into a woman? key:age
哪三个字母把一个女孩变成了妇女？ 答案：年龄
32. what has two legs but cann't walk? key:compass 什么东西有两条腿却不能走路 答案:圆规
33. what is pronounced like one letter,written with three letters,and belongs to all animals? key:eye
什么东西读起来像是一个字母，写起来是三个字母，并且所有动画都有它呢？ 答案：eye(眼睛)
34. what bird lifts heavy things? key:crane
什么鸟可以举起来很重的东西？ 答案：crane(鹤，另外一个意思是举重机)
35. what always goes up and never goes down? key:your age
什么东西永远只升不降 答案：你的年龄
36. what will you break once you say it? key:silence
什么东西你说出来就打破了它? 答案：沉默
37. why is the libray the highest building? key:it has the most stories?
为什么图书馆是最高的建筑？ 答案：因为它有所有的楼层 (story)