Tom’s never done extra work for his class,_______he—_______. He is the laziest boy in his class.

Johnson was much depressed as he didn’t sell half as many computers as he thought he____．

It is______ nice of you to say so.

left the light on.——Oh, so I have. _____________to turn it off.

Mrs Green, do you think I can get an A in the final exam if I start working hard now—Of course.________