─What’s the girl doing? ─She ______ a bike.
------I didn’t go to the party _________my homework last night.------Oh! ___________
The police warned the children __________football in the street.
__________does it cost to go from Shanghai to Beijing?
They spent _________time ___________ the computer games.
-----Why do many people like to ride bikes?----Because bikes not only need ________ space, but also cause _________accidents.