用方框中所给的词的适当形式填空，使短文正确、通顺。每词限用一次。

　　The growing population is still a big problem in the world, especially in developing countries．The population in developing countries is larger than that in 　　1　　 ones．And it's growing faster than that in any other 　　2　　．

　　Chinese government has 　　3　　 out many plans．And they have．worked well in 　　4　　 China's population．Thanks to them, Chinese people's living conditions are improving 　　5　　

　　About 261 babies are 　　6　　 in the world every minute．Just imagine how many more 　　7　　 there will be in one year．China is a country with the 　　8　　 population, so we still have a long way to go．We should do something to 　　9　　 down the growth of the population．It's important for each family to have fewer but 　　10　　 children．Or maybe there won't be enough places for people to stand on the earth in the future．