For ages, Bill Gates has been supporting educational programmes that ______from kindergartens to universities.

What did the boy do just now—He ran______ the road to pick up his ball.

A lot of famous doctors gathered in New York_____ save this old woman.

I try to understand ________ that prevents so many children from being happy, there seem to be three causes.

My friend doesn’t like western food. He would rather eat bread than _______ hamburgers.