The document discusses several topics: 1) An artificial ankle called iWalk that uses springs and a battery to make walking easier for those who have lost a leg. 2) A debate around whether prosthetics give amputee athletes an unfair advantage in competitive running. 3) Different parts of speech and grammar rules covered in an online grammar tutorial.

1. Understanding the text -Part 1 T F T F T

2. Understanding the text -Part 2 Answers: They are painful. He couldn’t continue rock climbing. studying mechanical engineering at MIT Because they contained springs Harvard MIT

3. Understanding the text -Part 2 iWalk an artificial ankle that uses a rechargeable battery and springs makes walking easier and more natural 2007 a soldier who lost a leg in the Iraq war

4. Reading Skills- Part1 d

5. Reading Skills- Part2 light able-bodied sprinter IAAF un fair advantage argue achieve 輕的 身體健全的、健康的 短跑選手 國際田徑總會 不公平的 優勢 爭辯 達成

6. Reading Skills- Part2 d

7. Spotlight on Grammar 資料來源： http://www.grammarfree.com/tw/ 影片全文： http://www.grammarfree.com/tw/html.asp?id=45 相關練習： http://www.grammarfree.com/tw/gramex.asp?cateid=0501020

8. Spotlight on Grammar d c c b d d d b

9. Extension mixed-race amateur title Masters champion heritage tournament 混血的 業餘的 冠軍 名人賽 冠軍 傳承 、繼承 錦標賽

10. Extension b b c a c b c b