B. Diluting wastes needs certain amount of water.
C. Demands for water will go up along with the expanding population.
D. Intensive cultivation of land requires more and more chemicals. The reader can conclude that_______.
A. countries of the world will work together on pollution problems
B. byproducts from wastes lead to a more prosperous marketplace
C. science is making great progress on increasing water supplies
D. some industries are now making economic use of wastes
The author gives substance to the passage through the use of_______.
A. interviews with authorities in the field of water controls
B. opinion and personal observations
C. definitions which clarify important terms
D. strong argument and persuasions
The words prior to probably mean_______.
A. after B. during
C. before D. beyond
26. C 27. A 28. D 29. B 30. C
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