Look into the mirror and what do you see? You see yourself. But when you move. you do everything backward(相反地)in the mirror! If you wave your left hand, your right hand waves in the mirror. If you wink your right eye, your left eye, your left eye winks(眨). Try to read a page in the mirror .The words will be backwards.
What is really happening? You do not see through the glass of a mirror as you do through a window. The glass of a mirror has a silver coating on the back. The light from the sun or a bulb bounces (弹回)off you ,goes into the mirror ,and bounces straight back out to you again.
Mirrors have been used for thousands of years. The earliest were round pieces of shiny metal. Glass mirrors came late. The ancients thought that a mirror was magic. They did not understand how it worked. They thought they saw their spirits in a mirror and breaking a mirror brought bad luck.
Today mirrors have many uses .For example, they can make rooms look bigger and prettier. They also show us if our hair is combed(梳理) well and our faces are clean. On cars, buses and trucks, mirrors help drivers see traffic behind them. Mirrors are also used in telescopes(望远镜)and searchlights(探照灯).
Fun houses use mirrors. They make people look funny. Some mirrors are curved to make people seem short and round or tall and tin They make people laugh at themselves.
If you wave your right hand, you can see your         In the mirror.

A．left hand down	B．left hand wave
C．right hand wave	D．right hand up

Mirrors       .

A．appeared a long time ago

B．were made of glass at first

C．made of metal are popular today

D．had many uses in ancient times

Mirrors were magic in the past because      .

A．people thought they could see their spirits in mirrors

B．they were used in magic shows

C．they could make people change their heights and weights

D．they could make people laugh

What does the word “curved” mean in Chinese?

A．雕刻

B．油漆

C．扭转

D．弯曲