Scientists say it may be five or six years _______ it is possible to test this medicine on human patients.
—Will you attend the ceremony tomorrow? —What ceremony? I ____ informed of anything about it.
---Monitor? --- I’m not monitor of our class. I __ with the teacher until the monitor is elected.
How long do you think ______ the computer company brings out a new product?
In the reading room, we found her____ at a desk, with her attention____ on a book.
______ , the players began the game.