We all believe that ______2010 Shanghai World Expo must be ___success.
______ some pennies , I think there are only nine pounds left in my pocket.
To keep healthy, Professor Johnson ______ cycling as a regular form of exercise after he retired.
One way to understand thousands of new words is to gain _____ good knowledge of basic word information.
It was announced that only when the fire was under control ____ to return to their homes.
The driver _____ for the accident had not been driving carefully.