用方框中所给单词的适当形式填空，使短文正确、通顺。（每词限用一次）（每小题1分,计10分）
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In 2005, the world’s population was about 6.5 billion. More than three billion people live in Asia now. That’s almost 92_________ of the world’s population.
China has the largest population in the world, and about one fifth of the people in the world 93_________ in China. Because of the large population, there is less living space for 94 _________ family. And it’s difficult for lots of people to find 95_________. The large population also causes many other difficulties for the 96_________ nation. For example, we are 97_________of energy and water. Most cities are more crowded than before, and the traffic is much 98 _________. The large population has become a serious problem.
So far, our government has taken many measures to control the population. One is known 99_________ the one-child policy. It has worked 100_________ in controlling China’s population. Thanks to the policy, China is developing quickly and people’s living conditions are improving rapidly. 101_________, the population problem is still serious in China. We still have a long long way to go.