Whose book is it —Look! Jane’s name is on the cover(封面). It _________ hers.

Do you often get online– Yes , I _______ lots of time on it. It’s a good way to kill time.

The new hospital will be located in _________ used to be a wasteland and a huge shopping mall will also be constructed ________ there used to be a school many years ago.

Must we sweep the floor right now No, you _______. You can do it later.

Not only ______ polluted but ______crowded.