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We can use many kinds of energy. Most energy in the l today comes from 2 coal and oil. But this will not be so in the year 2050. We will get much of our energy _ 3 water, the sun and the 4 .We will produce atomic(原子) energy, much more coal and 5 as raw material（原始材料）for cloth, plastics and other things. 　　Some 6 of the world are very dry. Very __7_ people live there, 8 there is a lot of sunshine and wind. With 9 atomic energy and energy from the sun and wind, we will be able to bring fresh water from far away or change sea water 10 fresh water.
( )1. A. moon ( )2. A. burning ( )3. A. in ( )4. A. moon ( )5. A. water ( )6. A. parts ( )7. A. few ( )8. A. and ( )9. A. cheap ( )10. A. to	B. sun B. to burn B. from B. cloud B. paper B. places B. little B. but B. expensive B. into	C. world C. boil C. on C. wind C. glass C. hills C. a few C. then C. a little C. from	D. space D. boiling D. to D. snow D. oil D. ground D. a little D. so D. good D. for

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Villagers are more healthy than people who live in towns. Orie reason for this is that country air is fresher than the air in 1 . The villager breathes fresh clean air all day in the fields, but the air the townsman 2 is always full of smoke and dust. 　　We can't live without air. If we are stopped from breathing 3 for five minutes, we will die. Bad air means bad health and certain kinds of 4 , which may kill us in the end, 5 they may not kill us at once. 　　We all 6 what unpleasant feelings we get if we stay a long time in a shut, crowded room. After a time, we begin to feel very 7 , and can hardly keep our eyes open. Then our heads begin to ache, and the longer we stay, the worse we feel. How nice it is when we get 8 into the fresh air outside. 　　We must, therefore, keep our windows open, so that the 9 in our houses is always fresh, and we should breathe as much as we can in the open air. For people who breathe 10 air for a long time often get very ill and die of lung diseases.
( )1. A. factories ( )2. A. breathes ( )3. A. still ( )4. A. experience ( )5. A.so ( )6. A.imagirle ( )7. A. sleepy ( )8. A. up ( )9. A. air ( )10 . A. humid	B. cities B. eats B. as B. stress B.though B.know B.lonely B. down B. environment B. clean	C. streets C. takes C. even C. death C. since C. fear C. energetic C. out C. furniture C. open	D. fields D. smells D. except D. illness D. also D. expect D. exhausted D. off D. wind D. bad