He wrote his first novel ______ studying in a university.

The manager looked around the meeting room and said,“_____ everybody has arrived, let’s begin our meeting.”

. --- My son is addicted to drugs. He isn’t hopeless, is he?--- Yes, ______ he mends his way and starts all over.

Many workers were organized to clear away        remained of the World Trade Center.

         is no possibility          Bob will win the first prize in the match.