Who ______ the room —-My brother______.

Come on, everyone! We must be the first to complete the poster for the charity show.—Sure.____________.

In my opinion, China has more to deal with the disease of H1N1.— I quite agree with you. Chinese medicine works well.

It is such a difficult problem _______ no one can work out.

I arrived half an hour earlier ______ I had time to talk with him before the meeting