1.Have you heard the saying: what goes up must come down? Well what goes up and never goes down? (来源：老牌的英语学习网站 http://www.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?

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?

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

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?

6.A word I know, six letters it contains, Subtract just one, and twelve is what remains. What is the word?

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?

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

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

10.What two words have the most letters in it?

keys

1.your age

2.I'm a Volcano.

3.shadow

4.Eat or Ate

5.a sponge

6.dozens

7.a river

8.a keyboard

9.breath

10.post office