Earth is our home. It has air that we can breathe(呼吸). It has water for us to drink. It has plants and animals that we can eat. Earth is not too hot or too cold for us. It has everything we need to live.

    We are on earth, but we call see things that are not on earth. Early in the morning, we can see the sun comes up. All day, the sun seems to move across the sky. Later in the day, we can see the sun goes down. But the sun is not really moving around us. We are the ones who are moving. Every morning, we turn towards the sun. Every night, we turn away from it. Every year, we go around it. Earth is our spaceship. All of us in the spaceship are riding around the sun.

    At night, we can often see the moon and stars. From earth stars look like little points of light because they are so far away. But stars are really big. A star is a great mass of burning gas. It gives off light and heat. Our sun is a star.

    There are eight planets moving around our sun. Earth is the third planet around the sun. Some of the planets have moons. A moon goes around a planet just as a planet goes around a star. Earth has only one moon. Some planets have more.

A. Emily often feels tired and seems to be lack of energy.

B. Jeff spent his summer vacation on the beach and got serious sun-burnt.

C. Linda feel nervous before the new people.

D. Tony sometimes feels pains in his bones and he has loose teeth.

E. Kate has poor eyesight and she can't see clearly at night.

F. Luke is so careless that he often gets hurt. And it takes a long time for his wound（伤口） to heal.

    Mr Perkin stood at the bus-stop and watched the cars go by. Many of the car were new Beta 400s, and most of them were yellow. Mr Perkin always wore the same clothes as other men, ate the same food as other people, and did the same things after work, and at the end of the week, Mr Perkin did not like to be different.The following week, Mr Perkin bought a new, bright yellow Beta 400s. He was satisfied with it, and drove to work in it the very next day. He was even more satisfied with his new car, when he saw all the other Beta 400s, in front, behind, and on both sides of him.He likes the feeling of being the same.Mr Perkin parked(停车) his car in a big car-park(停车场) near his office, and walked the rest of the way. But when he came back at five o'clock, there were so many bright yellow Beta 400s in the car-park that he did not know which car was his. He tried his key in some of the cars, but people passing by gave him a look he didn't like. So he stopped. Time went by.Poor Mr Perkin had to wait nearly two hours until his was the only yellow.Beta 400s in the car-park. After he got back home, he felt frustrated and thought to himself that maybe being different is not so bad.

    A friend of mine was fond of drawing horses. He drew the horses very well, but he always began at the tail. Now it is the western rule to begin at the head of the horse. That is why I was surprised. It struck me that it could not really make any difference whether the artist begins at the head or the tail or the belly(肚子) or the foot of the horse, if he really knows his business. And most great artists who really know their business do not follow other people's rules. They make their own rules. Every one of them does his work in a way peculiar( 奇特的) to himself; and the peculiarity means that only he finds it more easy to work in that way.

    Now the very same thing is true to literature(文学). And the question," How shall I begin?" only means that you want to begin at the head instead of beginning at the tail or somewhere else. That is, you are not yet experienced(有经验的) enough to trust to your own powers. When you become more experienced you will never ask the question, and I think that you will often begin at the tail- that is to say, you will write the end of the story before you have even thought of the beginning.