—Kathy and her sister are so alike.—I can’t tell one from ____.
George. W. Bush, _______ President of the United States, is to visit China _______ third time.
--- Beautiful day, isn’t it? Shall we go out for a picnic? --- ________!
It’s _______ you do today that will make a difference in your life tomorrow.
Mr Green showed his students some photos ________ at World Expo 2010 Shanghai.
A group of children are looking into the box, ________ about what can be inside.