He ____ writing the paper now. He hadn’t written a single word when I left him ten minutes ago.

Mike is often absent from class.” “Tell him he _________ answer for it if he goes on behaving like that.”

The boy         the first prize, but he was so careless as to make a foolish mistake.

 Mr Li required the computer equipment referred ________ used in every classroom. 

--Well done, Jack !  --Thanks. But given more time, I__________ it better.