When I try to understand ______ that prevents so many Americans from being happy as one might expect, it seemed to me that there are two causes.
_____ anyone phone, write down the phone number and tell him I’ll call back later.
If you look from the top of the highest building of our school, you’ll get a better _____ of it.
The accidents of coal mines are believed ______ hundreds of deaths in China so far.
The Project Hope _____ to help the poor children to go to school in China _____ to be a success.
Tom ______ for 5 years, but he has been leading a new life since he was set free.