It was with great joy_________ he received the news that his lost daughter had been found.
| A．because | B．which | C．since | D．that |
Many developing countries are unwilling to pursue their economic development __________ destroying the environment despite there being several financial crises.
| A．at the risk of | B．at the cost of |
| C．at the end of | D．at the mercy of |
The athlete's years of hard training __________ when she finally won the Olympic gold medal.
| A．went on | B．got through |
| C．paid off | D．ended up |
Staying in hospital and taking special medicines __________ drug users an opportunity to stay away from drugs, which is __________ the key to breaking the addiction to drugs lies.
| A．serves; where | B．provides; what |
| C．give; that | D．allow; where |
Staying in hospital and taking special medicines __________ drug users an opportun It is illegal for a public official to ask people for gifts or money __________ favors to them.
| A．in preference to | B．in place of |
| C．in agreement with | D．in exchange for |
John has really got the job because he showed me the official letter __________ him it.
| A．offered | B．offering |
| C．to offer | D．to be offered |