4. 如果不冒險，任何人都不可能輕易實現(xiàn)他的夢想。(risk) 

Anyone can't achieve his dream easily without           .

3. 只有在你被追逐的時候，你才會快跑。

           you are pursued           you become swift. (It is only+從句+ that...)

2. 列舉數(shù)例，用以說明這一原理。

          to demonstrate this principle(here的倒裝句)

1. 有時我想知道我們是否能到達那里。

There were times when I wondered        we would get there.(whether…or…)

8. Don't          (擔(dān)心) that too much. It's nothing but a quiz.

7.          (不只是一個) answer is to your question.

6. You will           (得出錯誤的判斷) if you reason from false premises (前提) .

5. The first signs of spring are          (顯然可見) .

4. It's very noble of you to          (照顧) my old grandmother when I was out for business.

3. Thousands of children          (感染) HIV every day.