When people talk about the famous scenic spot in China, the first _________ comes into mind is the Great Wall.
After five years of preparation, Shanghai is presenting the world _______ many say is the greatest Special Olympics.
At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions ______ it was too late.
Catherine, ____ the alarm clock for 6 o’clock, or you would oversleep and be late for the train.
—Do you think he will do me a favor? —As far as I know, he is the last one to help others. He ____ be prepared to give you a hand, though.
—Isn't it a surprise that I happened to meet Francis Mafhews at the Christmas party last week? —If my memory serves me correctly, you ____ each other for exactly two years.