____the problem of land erosion(侵蚀) getting more serious, the government is searching for a way to deal with it.
| A．As | B．When | C．With | D．If |
Mo Yan was awarded the Nobel Prize for Literature in 2012，__________ made one of the Chinese people's long-held dreams come true.
| A．it |
| B．that |
| C．what |
| D．which |
It's much easier to make friends __________ you have similar interests.
| A．unless |
| B．when |
| C．even though |
| D．so that |
Experts believe __________ people can waste less food by shopping only when it is necessary.
| A．why |
| B．where |
| C．that |
| D．what |
Food supplies may __________ towards the end of the trip, so we can't waste any food.
| A．run out |
| B．run up |
| C．run into |
| D．run away |
The watch was very good, and he __________20 percent down for it.
| A．paid |
| B．cost |
| C．bought |
| D．spent |