Traveling is a good activity. When you are fed up with your work and study, and when you are free, you can go to a beautiful place to enjoy the beauty of nature, you can breathe fresh air, and make some friends. But sometimes, it is not a good thing. The weather often changes, you may be caught in the rain and may catch a cold while traveling. Therefore, you should prepare yourself carefully before the trip. You had better find a companion, so that you can help each other.

The population of the world has already passed six billion. The population problem may be the greatest challenge of the world today. The earth has been very crowded and there will be standing room only before long.

China’s One Child Policy is a good way to solve this problem and stop the population from growing so fast. It also can help our country develop quickly then people’s standard of living will become higher and higher.

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At the same time a lot of other problems will be done with, such as employment problems, food problems, water problems and so on…So I think it is necessary for China to carry out this policy.