单项选择题

The author gives substance to the passage through the use of______.

A．interviews with authorities in the field of water controls
B．definitions which clarify important terms
C．opinions and personal observations
D．strong arguments and persuasions
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单项选择题
Which of the following points is NOT included in the passage
A．Diluting wastes needs a certain amount of water.
B．Demands for water will go up along with the expanding population.
C．Intensive cultivation of land requires more and more chemicals.
D．Industrial development includes the simplification of complex chemical processes.
单项选择题
Later as one went on to apply for more important jobs, one was advised to include in the letter______.
A．something that would attract attention to one's application
B．a personal opinion about the organisation one was trying to join
C．something that would offend the person reading it .
D．a lie that one could easily get away with telling
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