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Most environmental problems are ______ to lacks of awareness and understanding of humans.

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Some people ________ that animals and plants will never become extinct.

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Maintaining biodiversity is_________ great importance of preserving the precious and rare animals.

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All rubbish and sewage has to be _________ treated before being discharged into seas and rivers.

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More and more specious animals ________ of environmental problems.

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The authority has made a lot of great efforts ________ endangered species.

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She never remembers to lock the door before leaving out, _____ she?

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It is important to raise the people’s _________ of environmental conservation.

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He has got________ money so he can’t buy this latest car.

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There is_____________ universal store next to my house.

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You should wear warm clothes in winter, _________ you will catch cold.

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This campaign for protecting endangered species appeals more than 20__________.

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___________ means a global list of endangered and vulnerable species.

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_____________ means the protection of natural environment.

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 __________ the cold weather, my family still managed to go for a pinic.