CROWDING THE PLANET This chart shows how much the world’s population grew between 1900 and 2000, and how much experts believe

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问题                     CROWDING THE PLANET
   This chart shows how much the world’s population grew between 1900 and 2000, and how much experts believe it will grow by 2025. The numbers are in billions.

When was the population under 2 billion?

选项 A、In 1.900
B、In 1925
C、In 1950
D、In 1975

答案A

解析 In 1900 the population was 1 billion, half of 2 billion. Choices (B), (C), and (D) have populations of 2 billion and over.  
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