—Mrs. Wang was sent to teach English in a poor mountain village last year.—She said she would never forget some pleasant      while working there.

Please pick up the ____. Don’t keep it on the floor.

— What do you think of the human and the computer?—A human ____can do some things better than a computer, for example, creating new ideas.

Can you see nine    in the picture? 

Beijing _________a lot in the last ten years. It is one of _________ in China.