Ⅰ.Match the word with its meaning.

　　1. leap A. 宇宙探测器，航天探测器

　　2. joint B. 航天飞机

　　3. probe C. 收看(电视)；收听(广播)

　　4. accustomed D. 假定，假设

　　5. shuttle E. 高级的，先进的

　　6. historic F. 爆炸

　　7. tune G. 耐心

　　8. witness H. 目击，亲眼看见；亲身经历

　　9. assume I. 共同的；联合的

　　10. patience J. 历史性的，有重大历史意义的

　　11. advanced K. 习惯的

　　12. burst L. 飞跃，跳跃

　　答案：1～6　LIAKBJ　7～12　CHDGEF

　　Ⅱ.Write down the meaning of phrases in each sentence.

　　1. He has earned $1,000,000 so far.迄今为止

　　2. You have to slow down your car at the crossing.减速

　　3. Ever since he came back from Europe, he has been telling me what he saw there.自从

　　4. He was long a famous musician, but he plays no longer.不再

　　5. When I told them the truth, they were all in shock; they couldn't believe it.处于震惊中

　　6. Madame Curie and her husband continued to work in spite of all the discomforts.不管

　　7. No man has ever set foot on that rocky island; it's impossible to land there.踏上

8. I thought he would be too old to get to the top of the mountain, but he made it at last.做成，成功