完形填空。

     Mike is a little boy. He    1   four years old. One day, his mother    2   him to see his grandmother.

His grandmother's home is very far    3   their house. So they go there   4  . There    5   only a few people

on the bus. They all sit on    6   seats. Mike is very happy. He looks    7   the window and talks with his

mother. After a while, Mike starts running on the bus. He runs and runs, "   8   are you always running?

Please sit   9   ," his mother says. "I want to see my grandmother   10   . I want the bus to move faster."

Mike answers.

B. makes        

B. off          

B. with a bus    

B. have          

B. their        

B. out          

B. How          

B. down          

B. later        

C. is        

C. lets      

C. to        

C. by bus    

C. are        

C. theirs    

C. from      

C. Why        

C. up        

C. earlier