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）

                                                                      The population in China
   China has the____ population in the world, and about one ____ of the people in the world live in China. Because of the large____  , there is less____ space for each family. And it's difficult for lots of people____  jobs. The large population also causes many____ difficulties for the whole nation .For example, we're ____ of energy and water. Most cities are ____   than before, ____ the traffic is much heavier .The large population____ a serious problem.

①表明我国综合国力日益增强                                    ②彰显我国负责任的大国形象 
③表明我国是发展最快变化最大的发达国家之一    ④能够增强中华民族的自信心和自豪感