—________ fish swim? (   )
— Yes, they can.

A．Can

B．Do

C．Are

填空题。
A. Yes  B. Come  C. Sit  D. sorry  E. close  F. up
【小题1】— I’m ___________, Mr Green.
— _________ in, Mike.
【小题2】Wang Bing, please __________ the window.
【小题3】— _________ down, please.
— Thank you.
【小题4】Stand ___________.
【小题5】— Liu Tao, please open the door.
— __________, Mr Green.