Which of the trend is true? According to the passage, what is the population of the time when the passage is written?

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问题 Which of the trend is true?
According to the passage, what is the population of the time when the passage is written?

选项 A、200 million.
B、300 million.
C、400 million.
D、500 million.

答案A

解析 根据第二段By the end of twenties of next century,the population of the United States will have doubled that of today…,而第一段提到…the population of the United States…will be 400 million in 2020.由此可知如今的人口应为2亿。
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