For some students, the computer serves only _____ a tool that is used to play games.
Giving children pocket money as a gift during the Spring Festival is a common _______ in China.
---Is there anything I can do for you, sir? ---___________. But I’m being served.
There are many talented actors out there just waiting _________.
A big earthquake broke out in Japan on March 11th 2011, _________ in many deaths and injuries.
As there is less and less coal and oil, scientists are exploring new ways of making use of ____ energy, such as sunlight, wind and water for power and fuel.