Why are the housing prices in big cities going up all the time?——One reason is that people are__________ into overcrowded cities in great numbers.

Were because of

填入下面横线上的话，与上下文衔接最恰当的一项是(　　)事实上，凡优秀的文艺作品，________因此它们才能成为生活的教科书，成为生活的良师益友。

The whole family still live in the house, most of _____ windows face south.

I’ve seen the man dog bit you.