【解析】

　　3．

　　Everybody,

　　A saying goes that “there’s only one mother earth’’. At present, more pollution has come into existence and our mother earth has become weaker and weaker. One source of the pollution is the over-releasing of carbon dioxide. As is known to all, too much carbon dioxide has caused the climate changes. Moreover, the over releasing of carbon dioxide may result in less rainfall, the global warming and so on.

　　How can we live a low-carbon life to protect our mother earth? Here is some advice:

　　1. Cut off all the electricity except the power supply for lights and the fridge.

　　2. Try walking or cycling instead of driving;

　　3. Don’t buy things with multi-layer packaging;

　　4. Use your own chopsticks when you go to a restaurant;

　　5. Don’t use too much soap when you wash your clothes.

　　So, wake up to live a low-carbon life to protect our planet.Keep the balance of nature. Low-carbon life has aroused much concern of residents. I hope more people will join the low-carbon campaign. Easy as it might be, it can really make an unbelievable difference.

　　Yours,

　　Li hua

　　【解析】

　　4．

　　Dear Tom,

　　It is nice to get your Email.Now let me tell you something about the Palace Museum.

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