2. 外语
  3. How many people are there on earth now? Now there are about _____________________________ of us on earth.

How many people are there on earth now? Now there are about _____________________________ of us on earth.

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问题 How many people are there on earth now?
Now there are about _____________________________ of us on earth.
The world’s population continues to grow. Now there are about (11) 4 billion of us on earth. That could reach 6 billion by the end of the century and (12) 11 billion in further 75 years. Experts have long been concerned about such a growth. Where will
选项
答案4 billion
解析
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