My uncle plays basketball _____ two hours every day.[ ]
Who taught ________ to write the computer program?—Nobody. She learned it by __________.
Why would some workers in Foxcon die _____ continue working in the factory? — Psychologists say they are under too much pressure. [ ]
Did you see Peter and Mike? No, I saw ______of them.
Look at the man in the classroom! Is he Mr. White?—No, it __________be him. He’s eating in the dining hall.