How long has this bookstore been in business? — _____ 1996[ ]

He had wonderful childhood, _____ with his mother to all corners of the world. [ ]

Last week the staff made______ suggestions, but unluckily they were just ______ impractical by the manager.

下列加横线字词类活用与其它三项不同的是（ ）

The light in his office is still on. Do you know —To work on a very important project.