根据材料内容，从方框中选择恰当的单词填空，使材料意思完整、通顺，有的需要变换形式，每词限用一次

hope, society, follow, way, allow, however, enough, government

    Everyone knows "the one-child policy". It is a(n) to control (控制) population. Chinese government to control the increasing population at first. Chinese people understood that and that policy for about 40 years.

    ，as time goes by, a problem appears in our society. China is now getting into an aging There will be more and more old people in the following years. But the society won't have doctors, or nurses to look after them.

    That's why Chinese  began "the two-child policy" on 1st January 2016. It  each family to have two children. The government thinks it can help stop our country from entering the aging society.