3. We’d better (分開(kāi)) the good ones from the bad ones.

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     There is not enough oil in the world now. As time goes by,it becomes less and less. So what are we going to do when oil runs out? Perhaps we will go back to use our horses,carriages (馬車(chē)) and bicycles.

   In the Second World War,some people didn’t use gas made from petroleum (石油) in their cars. They made gas from wood and plants instead. The car didnJt go fast,but they ran,so this was better than nothing. However,in the future,we can’t c?t down all our trees to make gas,we need our trees for other things too.

   Besides different types of gas,we can also use electricity (電) to run our cars,but first we must make electricity!Some countries have coal and make electricity with that,but we might not always have coal,either. Other countries have big,strong rivers,and they can use the power of water to turn turbines (滿輪機(jī)) and make electricity easily and cheaply.

   We are also able to get power from the ocean tides (海潮). We put turbines into the mouth of the river. When the tide comes in,the water turns the turbines and when it goes out,it turns them again.

  1. Is there enough oil in the world now?


2. When might people have to go back to use horses and carriages?

3. What did some people use to make gas in the Second World War?

4. Does oil become more or less?

5. Where are you also able to get power？

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    Mr Cross wanted to go to his hometown 1 . He liked to sit beside a window when he was flying. So he 2 a window seat when he got in the plane. He found that all of them were taken 3 one. There was a soldier sitting in the seat beside this one and Mr Cross was happy that the soldier had not 4 the one by the window. When he 5 it,Mr Cross saw that there was a piece of paper 6 some words on the seat. It said ,“This seat is broken. You can’t take it. Thank you. ” 

   “A broken seat in a plane? Is that 7 ?” Mr Cross said 8 ,but he walked on and found 9 empty seat,not beside a window,to sit in.

   When the plane was quite 10 ,a very beautiful girl got into the plane. As soon as he saw her,the soldier quickly took the paper off the seat beside his and let the girl sit in during the whole trip.

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