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最佳答案：Many people are concerned about the animal are how to adapt to the changing envi
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最佳答案：Because it can guide people how to improve and protect the environment
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最佳答案：How to protect the environment has become a major problem in the world
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最佳答案：This report dwells on how some species were exterminated because of the polluted
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最佳答案：How to put the energy to better use is one of the most important methods to solv
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最佳答案：4.Will you choose have dinner in our Chinese or West dinning room?5.How do you t