等等；诸如此类 on the whole on behalf of put up with and so on 答案 1.

　　that the earth is becoming warmer and that it is human activity that has caused this global warming rather than a random but natural phenomenon. 毫无疑问，地球正变得更加暖和，并且全球变暖是人为的，而不是随意的自然现象。 2.

　　the amount of carbon dioxide and other greenhouse gases，the climate is going to keep on warming for decades or centuries. 即使我们开始减少二氧化碳和其他温室气体的含量，在(未来)几十年或几个世纪内，气候仍会持续转暖。 There is no doubt Even if we start reducing 经典句式 答案 3.It is OK to leave an electrical appliance on

　　— ，turn it off! 只要你在使用电器设备，你便可以把它开着，如果不用就把它关掉！ 4.

　　from new materials，so，if you can，buy things made from recycled materials. 用新材料来制作物品要花费大量的能源，因此，只要有可能，就买那些用回收材料制成的物品吧。 so long as you are using it if not It takes a lot of energy to make things 答案 1.

　　is no doubt that the earth is becoming warmer but there is a fierce debate over whether it is human activity that has caused this global warming 2.

　　whether it is just a natural phenomenon. Many scientists like Dr.Janice Foster believe that people have caused 3. increase in the earth’s temperature by burning fossil fuels like coal，natural gas and oil to produce energy whose by­products 4.

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