The Internet is really ______ to us. We can easily find the information we need.
— _____ are stamps used ______? — Sending letters.
Christmas is coming. Tom will ______ New York for the family get-together.
—He may be in the classroom, I think.—No, he _______ be in the classroom. I saw him go home a minute ago.
—Have you cooked supper_______? —Yes, I have _______ finished it.
It’s more than 8 years since I _______ a teacher.