2 . Man’s understanding of nature is developing ________ ________ ________ (一直). It never remains at the same level. (根据汉语提示完成句子)

3 . 写出画线部分属于什么短语及其所作的成分
1. He is a very careful worker. 
属于______；在句中作______。
2. The yellow house is for sale. 
属于______；在句中作______。
3. We made him our sales manager. 
属于______；在句中作______。
4. I find the problem really confusing. 
属于______；在句中作______。
5. Much interested, he agreed to give it a try. 
属于______；在句中作______。
6. I need some interesting Chinese storybooks. 
属于______；在句中作______。
7. Paul doesn’t have to be made to learn. He always works very hard. 
属于______；在句中作______。
8. Harvard is one of the most famous universities. 
属于______；在句中作______。

4 . 在学校，一些学生很活跃而一些却很害羞，然而他们都可能彼此成为好朋友。
At school, _______________, yet they can be good friends with one another.

6 . He had to ________ that it was not easy to gain ________ to the Buckingham Palace. (admit) (所给词的适当形式填空)

8 . 还没有证据表明这一治疗手段是有效的。(evidence) (汉译英)

9 . 鲜花可使沉闷的房间恢复生气。
Flowers can _________ a dull room __________________.

10 . They finally found the work ________(很难完成) in a week. (根据汉语提示完成句子)