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根据首字母填空London used to be "foggy"-fog was in fact smog,amixtu

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根据首字母填空
London used to be "foggy"-fog was in fact smog,amixture of smoke and fog.In other words,it was c__(1)__ by air pollution.in london ,some of this p__(2)__ come from factories,but alot of it came fromthe cocal that people burnt in their houses to keep w__(3)__during the winter.by the 1995s,london`s smog problem had become so bad that the government decideed to do something to clean up the air.it didn`t a_ (4)__ people to burn cocal in any British city.A few years later,the air become much cleaner.
today,many chinese cities realisethe same problems with air pollution that london faced forty years ago.thisproblem is much difficult for chinesecities to s__(5)__.one reason is that many of the pollution come from big factories,r__(6)__ than from coal burnt in people`s houses.if these factories were suddenly closed,this would do h__(7)__ to the economy and lots of people would lose lose jobs.A__(8)__ reasonis that changing from coal to cleaner fuels in quite expensive.H__(9)__,the air in many chinese cities is becoming much cleaner because conmon people pay more and more a__(10)__ to protect the government
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