In 2010, the world’ s population was about 6.8 billion. More than three billion people live in Asia now. That’ s  ____（更多）half of the world’ s p__________.       

China has the____________（large）population in the world, and about one fifth of the people in the world live in China. Because         the large population, there is________（little）living space for each family. And it is difficult for lots of people             jobs. At the     time,  the  large population has__________（cause） many other________（difficulty） for  the  whole  nation.  For_________, it is hard for China to s            energy and the traffic is much__________（heavy）. Natural environment are becoming worse and worse. The large population has been a serious problem.

So far, our government has taken many m__________ to control the population. One is known the one -child policy. It has worked well in________（control）China’s population.           to the policy, China is developing quickly and people’s living conditions are improving         ( rapid ) . The population problem is still serious in China. We still have a long way          ( go) .