Four teams of three people would compete ______ the game and the winners would receive a free vacation

Boys and girls , wait for a moment ! –OK. We can’t cross the street ________the traffic lights are green.

Our class is going to take a _________trip to Suzhou and we excited about it.

Look at the skirt. I bought it for my daughter ______ Children’s Day.

________ honest is the first thing people should learn.