--- Have you finished your work _______?---Yes, I've _______ finished it.
--We’ll go to the Great Wall___ it is sunny tomorrow.--OK! Walking on the Great Wall must be great fun.
– 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.