3. I’ve talked a lot about walking.　　　 　, I want to say it is a cheap, safe and enjoyable form of exercise.

A. In addition　　 B. In conclusion　　 C. In all 　　　　　D. Above all

2. Language learning requires a good environment 　　　　the language is widely spoken and used.

A. in which　　　 B. by which　　　　 C. from which　　　 D. with which

从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。

1. After ten years, he 　　　　　as manager and we had to find another man for his position.

A. worked　　　　 B. returned　　　　 C. resigned　　　　 D. began

5. 尽管这是我第一次来这里，但是我没费劲就找到他家了。(for the first time)

提升练习

4. 你的房间太乱了，你最好找个时间整理一下。(put ...in order)

3. 刘翔是一个能让中国为之自豪的人。(be proud of)

2. 我想起来了，他也许对我们讨论过的那个问题感兴趣。(be interested in)

1. 一战期间，德国同世界上好多国家开战。(be at war with)

4. They were having an 　　　　(argue)about their children.

3. He is an 　　　　(influence)politician in his country.