—How nice the building is! What is it for?—It _________ be a hotel. But I’m not sure.
– Do you know how many _____ a horse has and how many _____ a bee has? --- Of course, I know.
Is it important us learn English well?
________ city would you like to live in, Beijing, Shanghai or Chongqing?
If you for your favorite TV programs, you will feel sleepy.
Eddie has ________ to do, and he sleeps all day long.