The population of this city ,forty percent of which_____, ______ 15% in the last three years

 The _______ of students in our class are from the country; only five are from cities.

He didn’t selfishly keep for himself the money inherited from his uncle. Instead, he made a ______ contribution to help the community.

After the snowstorm broke out, what should be immediately done is to provide ________ for those people who lost their homes.

 I ______ the help of my colleagues in the preparation of this new column.