1.Have you heard the saying: what goes up must come down? Well what goes up and never goes down?

(来源：英语麦当劳－英语杂志 EnglishCN.com)

2.My thunder comes before my lightning. My lightning comes before my rain. My rain dries up all the land it touches. What am I?

(来源：英语学习门户网站EnglishCN.com)

3.You can see it, but you can't touch it. It may disappear, but has never really left you. It grows throughout the day. What is it? (来源：英语博客 http://space.englishcn.com)

4.What common English verb becomes its own past tense by rearranging its letters?

(来源：英语问答中心 http://ask.englishcn.com)

5.I have holes on the top and bottom. And I have holes in the middle, yet I still hold water. I have holes on my left and on my rig. What am I?

(来源：英语博客 http://space.englishcn.com)

6.A word I know, six letters it contains, Subtract just one, and twelve is what remains. What is the word? (来源：英语交友 http://friends.englishcn.com)

7.What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

(来源：英语聊天室 http://chat.EnglishCN.com)

8.What object has keys that open no locks, space but no room, and you can enter but not go in?

(来源：英语电影下载 http://bt.englishcn.com)

9.Light as a feather, there is nothing in it; the strongest man can't hold it for much more than a minute?

(来源：英语电影下载 http://bt.englishcn.com)

10.What two words have the most letters in it? (来源：EnglishCN英语问答中心[e问e答])

keys

1.your age

2.I'm a Volcano.

(来源：英语交友 http://friends.englishcn.com)

3.shadow (来源：英语美食指南 http://food.englishcn.com)

4.Eat or Ate

5.a sponge

(来源：英语麦当劳 http://www.EnglishCN.com)

6.dozens (来源：英语麦当劳www.EnglishCN.com)

7.a river

8.a keyboard (来源：英语麦当劳－英语学习门户 EnglishCN.com)

9.breath

(来源：英语分类信息 http://fl.englishcn.com)

10.post office

(来源：专业英语学习网站 http://www.EnglishCN.com)