1 . Organic farming is simply farming _____________ any chemicals. Organic farmers focus on keeping their soil rich and _____________disease through natural means.
有机耕作就是不用任何化学肥料的耕作。有机耕作的农民注重通过自然的方式保持土壤肥沃和免受病害。

2 . It is said that his son is studying in a foreign country now. (句型转换)
→His son _________________ in a foreign country now.

3 . ________________ the air in this city will become much cleaner.
人们希望这个城市的空气会变得更干净。

4 . ________________ one third of citizens plan to buy a car.
据报道，三分之一的市民打算买车。

5 . ________________ global warming is due to human activities.
人们相信，全球变暖归因于人类的活动。

6 . I can tolerate the house ________________, but I hate it if it’s not clean.
我可以容忍房间里不整齐，但是我讨厌房间里脏乱不堪。

7 . Police ________________.
警方把事故归咎于危险驾驶。

8 . The polluted water _______________ the spread of cholera.
被污染的水造成了霍乱的传播。

9 . What makes me happy is that I’ll ________________ next year.
让我高兴的是我明年就能还清债务了。

10 . It was ________________ that they had to change the schedule of leaving.
因为恶劣的天气他们不得不改变了离开的日程。