It is ___ the customers’ needs that has made chain stores so popular in big cities in China.

Each of the students, working hard at his or her lessons,___to go to university.” “So do I.”

________ with his work in the Satellite Launch Site，he could not spare any time to stay with his parents though they are very old.

In fact, the chances of anybody ______ by a whale are rather low. 

 I often dream of jogging out with snow _______ the ground.