If he goes on driving like that, sooner or later, he will ____ an accident.

_________ knows anything about him because he never tells us ________ about him.

The living conditions in the countryside have improved greatly in recent years. –The farmers are living a much ______ life than before.

There used to a clean river in front of my house, but now everything has changed.

_______ of the students here _______ fromthe countryside.