Learning to do some team work with _______ is important in our daily life.
— Was it under the tree ________ you were away talking to a friend?— Sure. But when I got back there, the bike was gone.
Some families in the countryside were _____ poor _____ pay for the school. We should try our best to help them.
Difficulties are nothing _____we are not afraid of them.
Why not look up the new word in a dictionary you don’t know it?
—Do you know when ____? I miss him very much.—Don’t worry. I will tell you as soon as ____.