Shanghai is trying to control ________ number of cars on the road to ensure clean air for ________ 2010 World Expo.
The gym is a public place, so you should be ________ and leave all the machines clean after using them.
The ability to _____ one another for past wrongs is one of the greatest attributes that anyone should possess or exercise.
They were close ______ each other in high school and now are still ______ touch.
—I have won the first prize in the recent English contest.—______________!
—I have won the first prize in the recent English contest.
—______________!
I hurried back home only ________ that I had left my key at my office.