Many years, life was【C1】______than it is today. People didn’t have modem machines. There was no modem medicine,【C2】______. Li

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问题    Many years, life was【C1】______than it is today. People didn’t have modem machines. There was no modem medicine,【C2】______.
   Life today has brought new problems. One of the biggest is pollution( 污染 ). Water pollution has【C3】______our rivers and lakes dirty. It kills fish and affects( 影响 )our drinking water. Noise pollution makes us talk louder and【C4】______. Air pollution is the most serious kind of pollution. It affects【C5】______living thing in the world.
   Cars, planes and factories all pollute our air every day.
   Many countries are making laws(法律)to stop pollution. Factories, must from now on, clean their water【C6】______away, they mustn’t sent out dirty smoke into the air.
    We need to do many other things. We should put waste things in the dustbin(垃圾箱)【C7】______throwing them on the ground. We can go to work by bus【C8】______with our friends in the same car. If【C9】______people driving, there will be【C10】______pollution.
【C8】

选项 A、and
B、or
C、but

答案B

解析 参照上题,为了减少污染的发生,我们尽量乘公共汽车去上班或者和我们的明友坐一辆车去上班。
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