If you try to sit on two chairs, you will fall them For life, you must choose one chair. [ ]

Where does the tall boy sit in your classroom?—________ the back.[ ]

You see, “Food Safety” receives thousands of Internet hits a day.—Obviously, it has become one of the _________ topics recently.

Are you worried about the coming exam?—No, I think the more ________ you study, ________ mistakes you’ll make.

There are many sheep eating grass ______ the fields and ______ the hills.[ ]