According to the passage, which of the following is a serious consequence of irrigation？
A. Loss of flesh water for drinking
B. Decrease in the level of rivers
C. Excessive buildup of salts in the soil
D. Increase in the rate of soil erosion
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Employers try hard to find talents by themselves to
A. make recruitment a core department of their companies.
B. cut cost and guarantee better results.
C. ensure the effectiveness of the recruitment process.
D. come with little risk and high accountability for results.
The word peak in paragraph 2 is closest in meaning to
A. large vocabulary
B. difficult period
C. high point
D. sudden reversal
The term waterlogging in paragraph 6 means that
A. logs are floating in water
B. water is not available
C. the soil holds too much water
D. salts are removed from water
Which of the following statements can be inferred from paragraph 1 about the history of communication？
A. Certain advances in technology have greatly changed communication．
B. People have both loved and feared new developments in technology．
C. We do not know what people thought about before modern technology．
D. The history of modern communication began in the fifteenth century．
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