Look at your watch【B1】just one minute. During that time, 174 babies were born in【B2】world. Maybe you think that isn’t【B3】. Durin

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问题 Look at your watch【B1】just one minute. During that time, 174 babies were born in【B2】world. Maybe you think that isn’t【B3】. During the next hour, 10,440 more babies will【B4】born on the earth.
So it goes【B5】, hour【B6】hour, what will【B7】in a hundred years?
The population (人口) problem may be the【B8】one of the world today. The world’s population is growing faster and【B9】. A UN report says that the world population will be over 6.5 billion (65亿) by the end of the 2006. That means that in about 600 years, there will be standing room only on the earth. There will not be【B10】space for anybody else.

选项 A、for
B、in
C、since

答案A

解析 表示某一动作持续一段时间要用for。
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