摘要:他可能是为了锻炼在跑. He . (B)把划线部分的英文译成汉语. Many years ago, life was much harder than it is today. People didn’t have modern machines. There was no modern medicine, either. Life today has brought new problems. One of the biggest problems is pollution. Water pollution has made our rivers and lakes dirty. It killed our fish and pollute our drinking water.(38)Air pollution makes us talk louder and become angry more easily. Air pollution is the most serious kind of pollution. It’s hard to all the living things in the world. Cars, planes and factories all pollute our air every day, (39) sometimes the polluted air is so thick that it is like a quilt over a city. This kind of quilt is called smog. Many countries are making rules to fight pollution. Factories must now clean their water before it is poured away, they mustn’t blow dirty smoke into the air. We need to do many other things. We can put waste things in the dustbin and not throw it on the ground. We can go to work by bus or with our friends in the same car, (40) the fewer people drive ,the less pollution there will be . 38 . 39 . 40 .

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