7. trial and error 反复试验

8. keep track of 保持联系

9. make a contribution to... 为......作贡献

10. now that 既然

11. come up with 提出

12. after all 毕竟

短语闯关

下列短语都是这两个单元学过的重要短语，请你根据汉语在横线上填人一个正确的词，每个词5分，80分才能过关，你一定能过关，做好了闯关的准备吗?那么我们就开始吧?

1. get ____ 四处走动；活动

2. get ____ to 适应于......；习惯于......

3. allow ____ 顾及；为......做准备；考虑到

4. get / be ____ 遇到困难；陷进去；被困住

5. break ____ from摆脱；脱离

6. be ____ of 知道；意识到

7. trial and ____ 反复实验；不断摸索

8. ____ all 毕竟；终究；归根到底

9. keep track ____ 保持联系

10. make a contribution ____ 对......作出贡献

11. ____ sure 确保；查明

12. adjust ____ 适应于

13. take ____ in参加

14. compete ____ 竞争；对抗；比赛

15. let ____ 放出；泄密

16. translate...____ ......把......译成......

17. ____ times有时

18. prepare ____ 为......做准备

19. be different ____ 与......不同

20. ____ than 多于；不仪仅；极其

☆交际用语☆

1. I'm sure I would be able to...

2. If I..., I would be able to...

3. I would need help to...

4. It would be difficult to...

5. I would try to...

6. This invention can help people...

7. This is a new way of...

8. How does it work?

9. What's it made of?

10. How would people use it?

☆单词聚焦☆

1. ability n. 能力

What a pity. He has the ability to learn, but he doesn't want to. 很遗憾，他有能力学，然而不想学。Mary is a woman of great ability. 玛丽是个很有能力的女子。The school cares for children 0f different abilities. 学校关心不同才能孩子的需要。

3. adjust v. 调整，使适应，使适合 She carefully adjusted her clothes and her hair before going out. 她出门之前仔细地整了整