. -Tommy, do you know if Frank ______ to the theatre with us this Sunday if it ______? -Sorry, I have no idea.
—Shall I tell you about it?—No, you _______. Sandy has told me already.
The math problem is _______ difficult and _______ of them can work it out.
_______ of the students in our class _______ interested in micro blogs (微博) on the Internet.
_______ great fun it is to play games on _______ QQ!
----Kathy, what do you think of my painting? ----_____________.