2. 外语
  3. The population problem may be the【B1】 one of tile world today. The world’s population is growing【B2】. Two thousand years ago, th

The population problem may be the【B1】 one of tile world today. The world’s population is growing【B2】. Two thousand years ago, th

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问题 The population problem may be the【B1】 one of tile world today. The world’s population is growing【B2】. Two thousand years ago, there were only 250 million people 【B3】 the earth. Four hundred years ago, the number was【B4】500 million. But at the beginning of the【B5】 century, the world’s population was about 1,700 million. In 1970, this number was 3,600 million. In 1990, the number was five billion. A 【B6】report says that the world population will 【B7】six billion by the end of the 20th century. This is just ten【B8】after it【B9】 five billion.  People say that by the year 2010,【B10】may be seven billion.
选项 A、great
B、greater
C、greatest
答案C
解析 这句话的意思是人口问题是当今世界最大的问题之一，因此应该使用最高级。
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