A.Ways to reduce the costs of building dams. |
B.Steps to improving water use management. |
C.Measures to deal with worldwide water shortages. |
D.Approaches to handling the pressure on water supply. |
A.much of the world's water is available for use |
B.people in high rainfall countries feel lucky |
C.the costs of water redistribution should be considered |
D.water can be easily carried through pipes across the world |
A.water supply and increasing population |
B.water shortages and environmental protection |
C.water redistribution and wildlife protection |
D.water use management and agriculture |
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A.monkeys and anteaters | B.tigers and apes |
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A.increase the population |
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A.often ask for more pay |
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A.discovered | B.treated | C.caused | D.cured |
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B.The author thinks human cloning is impossible. |
C.The author does not really support the idea of human cloning. |
D.The author is quite excited about human cloning. |
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