The boy usually gets to school on foot.  (改为同义句)
The boy usually ________ ________ school.
It takes about an hour to get to the library. (对划线部分提问)
________ ________ does it take to get to the library?
.Mary can play ping-pong and soccer.  (改为否定句)
Mary ________ play ping-pong ________ soccer.
Do you do your homework at school? (用Ann作主语改写句子)
________ Ann do ________ homework at school?
Mary always plays sports after school. (对划线部分提问)
________ does Mary always ________ after school?