In old China, the poor suffered from cold and hunger ________ the rich enjoyed all the good things of life.

 We won’t start the meeting ___ our teacher arrives.

—Hurry up! The bus is coming. —Wait a minute. Don’t cross the street _______ the traffic lights are green.

I like to eat something sweet, ____candy, ice cream and chocolate.

You should get up early _______ you would catch the train.