你把这些提示加进上面的作文就可以了
1. China has 3 billion and the number of its population is becoming larger and larger.
2.3 The large population causes many problems both in cities and in the countryside.Many people that live in the countryside are going to the cities to find work and get good medical care.As a result,the cities are becoming more and more crowded and dirtier. In the countryside,the problem is that no one is willing to grow rice and vegetables
4 So China, the largest developing country, has kept the policy “one couple, one child.” and given farmers more money so that they are willing to grow rice and vegetables


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