Light is very important in our life.We can't live without light.Blindfold
用布蒙住眼睛) yourself and try to move around the classroom.Can you do it?You may fall over a chair or walk onto the wall.You feel helpless if you move in the dark.Now do you see how important light is?Close your eyes and think about what it would be like to live a world without light.With the help of a magnifying glass（放大镜）,you can make use of light from the sun to burn(燃烧)a piece of paper.This shows that light is a kind of energy(能量).Everything in the world needs light.
1.What is light?A.It’s something like magnifying glass.B.It’s something to keep us warm.C.It is the world.D.It is a kind of energy.3 2.You will feel _______if you try to move around in a room without light.A.unhappy B.interesting C.helpless D.helpful 3.People would _________ in a world without light.A.find it difficult to live B.find it easy to work C.not fall over a chair or walk into the wall D.feel it interesting 4.Which is right?A.Our world needs a little light.B.Light is very important to us.C.Light is helpless to man.D.Light is nothing to do with our life.5.________without the help of a magnifying glass.A.The light from the sun can’t burn a piece of paper.B.The sun can burn a piece of paper.C.The energy can’t burn a piece of paper.D.People can’t live in the world.