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1，人口问题：The Population Problem The population problem is one of the most serious problems in the world today.China has the largest population in the world.If population grows too fast, it will bring lots of serious troubles.Overpopulation makes the traffic crowded.It makes the environment terrible.So we must try our best to control the population,2.英语的广泛运用It’s very important for us to learn English well.English is the most widely used language in the world.It is also used as an international language.It’s spoken by more than 400 million people as their first language.Many countries use English as a foreign language.English is widely used for international busine.Chinese use English as a second language.China’s reform and opening-up policy, China’s entry into WTO and the 2008 Olympic Games encourage more and more Chinese to learn English.So we must try our best to learn English well and make a contribution to building our country better.3.环境问题： 文章大概内容是：人类.乱伐树林，.乱扔垃圾 3，不加处理排放废物 最后导致1.土地沙化 2.河水变脏 3.空气质量差 4.全球气温升高，最后给出至少两条合理建议 As time goes by, man is making the earth sick.People cut down too many trees and throw rubbish away here and there.Many factories pour waste water into rivers and lakes.As a result, a lot of rich land has changed into desert, leaving only sand.Many rivers and lakes are dead now.The air is becoming dirtier and dirtier.The temperature on the earth becomes higher and higher.Many people now are in bad health.I think everyone is supposed to reduce the waste.Recycling can not only protect the environment but also save money.We’d better not buy bottles or boxes which people can use only once.If we are greener people, our world will become more and more beautiful.4.我的家乡的变化或某城市的变化，写过很多了，自己归纳吧
