What is the hardest thing about learning to ride a bicycle? 什么是最难的事关于学会乘驾自行车？

What is the hardest thing about learning to ride a bicycle? 什么是最难的事关于学会乘驾自行车？

What always has one eye open but can’t see? 什么总有一只眼睛开放，但不能看？

What goes all over the house, but touches nothing? 什么什么都不在房子去，但接触？

What belongs only to you and yet is used more by others than by yourself? 比单独仅属于什么您，仍然是其他使用更多？

Which letter of the alphabet separates Europe from Africa? 哪个字母表从非洲分离欧洲？

Why is a river rich? 为什么是河富有的？

I have cities but no houses, forests but no trees; rivers but without water what am I? 我没有城市，但房子，森林，而是没有树; 河，但没有水什么是我？
A man jumped from a plane, but there was nothing wrong with him. Do you know why? 一个人从飞机跳，但他没有错。 您是否知道为什么？

In a train, a woman saw other peoples’ faces were dirty. What would she do, do you know? 在火车，妇女看见其他人民面孔是肮脏的。 她会做什么，您知道？

Why did John say he didn’t know where the sun was? 为什么约翰言他做不知道哪里太阳？

Where does a person stay for the longest time in his life? 人在哪里停留在很长时间在他的生活中？

What is the hardest thing about learning to ride a bicycle?
地面（The ground）hard有困难和硬的意思。

What always has one eye open but can't see?
肚脐眼(the bellybutton)

What goes all over the house, but touches nothing?
空气(Air)

What belongs only to you and yet is used more by others than by yourself?
姓名(name)

Which letter of the alphabet separates Europe from Africa?
C (Sea,非洲同欧洲之间有地中海同红海)

Why is a river rich?
because it has 2 banks!(bank的意思有岸，还有银行的意思）

I have cities but no houses, forests but no trees; rivers but without water what am I?
地图(map)

A man jumped from a plane, but there was nothing wrong with him. Do you know why?
跳伞（bail out）

In a train, a woman saw other peoples’ faces were dirty. What would she do, do you know?
她会闭上眼。（She would close her eyes,of course.)

Why did John say he didn’t know where the sun was?
他是盲人（He is blindman)