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最佳答案：please turn off the light after class
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最佳答案：When leaving the classroom, I will turn off the lights, electric fans and the te
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最佳答案：sweep the flooropen the windowclose the windowturn on the lightturn off the ligh
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最佳答案：1.What should we do to save our environment?What can we do?Firstly,we can start
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最佳答案：1.keep waiting2.advise start off early / propose set out early3.forget to turn o
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最佳答案：参照当地时间 refer to the local time
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最佳答案：it can decrease greenhouse gases.We shouldn't left the light on when we are away
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最佳答案：Everyone could affect the environment and take the measure to improve it. There
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最佳答案：Form the habit of savoring.Please unplug the plug when you don't use TV or washi