Some of the drivers were ______ by the police because of their good behavior in the traffic accident.

Harry, you can’ go out since you haven’t finished your homework; __________ , a heavy rain is upon us tonight.[ ]

. 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.

The Shanghai Expo has had a major impactupon China. It is the first World Expo _________ in a developing country in theevent’s 159-year history.

I used to feel very nervous when I stood up in front of others, but now I feel quite ______when giving a speech to the school