Do you know ________?
–There is _______ interesting book on the teacher’s desk. --Oh, ______ book is Wei Fang’s.
— Excuse me, but can I sit here? — ________. The man who sat here says he will be back soon.
—Could you tell me ________? —By searching the Internet.
I have made ________ new friends here that I really enjoy my school life.
—Do you know ________ Simon is? —I met him in the school library just now. He may be still there.