题目

初中英语完形填空!The earth is our home .We must take care of it 请选出正确答案并解释为什么!
The earth is our home.We must take care of it.Life today is easier than it was __1__ years ago,but it has brought some new problems.One of the biggest problems is pollution.We can see it,smell it,drink it and even hear it.Man has polluted the __2__.The more people,the more pollution.Many years ago,the problem was not so serious because there were not so __3__ people.When the land was used up or the river was not clean in a place,man went to __4__ place.Now man is slowly polluting the whole world.__5__ pollution is still the most serious,it’s bad for __6__ things in the world.Many countries don’t let people burn __7__ for air in the houses and factories in the city.Pollution by SO2 is now the most dangerous kind of air pollution.It’s caused by heavy traffic.People say it’s __8__ to ride bikes.When you are riding,there is no pollution.But even in developed countries,most people don’t go to work by bike.It’s not be

提问时间：2020-06-13

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