每个人都对人口问题很关注。
2．为什么会有巨大的人口增长呢
3．要改变环境，人们应采取措施。

A．the first word children learn in any language is "bread"
B．the Phrygian language was the oldest in the world.
C．the oldest word in any language is that of "bread"
D．the Phrygian language was the easiest in the world to learn.