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In his youth, Darwin was an average student.__1__ he was a big reader. He also was an eager __2__， especially of beetles and butterflies. (He once carried two beetles, one in each hand, and then saw a __3__ so interesting that he decided to put it in his mouth.)
__4__ it came time for higher education, Darwin went to Edinburgh in Scotland to study medicine. But he soon found that he couldn't __5__ the sight of blood. So he left and went to school at the University of Cambridge in England __6__. He was preparing to become a minister, a profession in which blood shouldn't be a(n) __7__.
His heart was not in __8__， though. He spent his time at Cambridge collecting __9__ bugs and talking about science with people like the geologist Adam Sedgwick and the botanist John Stevens Henslow. Henslow saw that Darwin could be a __10__， and helped him get the chance to go on a long sea __11__ of exploration on a ship called the Beagle.
__12__ that ship's five－year trip around the world, Darwin observed many __13__ of life and various geological formations and fossils in South America and islands in the Pacific Ocean.__14__ the time the voyage ended, in 1836, Darwin knew more about life than anybody else.
During this trip, Darwin sent __15__ back to England. So he was well known as a scientist when he __16__. But __17__ becoming a professor, Darwin moved to the __18__. For some reason he was almost always __19__ with a stomach disorder. Doctors couldn't help him. (Even today, experts __20__ what disease he might have had.) So he lived an isolated life with his wife and family. He did experiments, studied plants and animals, read books and wrote papers in the comfort of his country home.
1. A. And B. So C. Or D. But
2. A. collector B. learner C. instructor D. farmer
3. A. larger B. third C. beetle D. second
4. A. Before B. Although C. When D. Until
5. A. meet B. like C. catch D. stand
6. A. yet B. instead C. too D. soon
7. A. sight B. operation C. problem D. necessary
8. A. religion B. study C. research D. science
9. A. fewer B. more C. rarer D. bigger
10. A. scientist B. minister C. geologist D. learner
11. A. discoveries B. voyage C. fishing D. passage
12. A. Before B. After C. Until D. During
13. A. forms B. sizes C. heights D. years
14. A. In B. After C. By D. During
15. A. reports B. application C. news D. bugs
16. A. started out B. came back C. passed away D. sailed out
17. A. fond of B. content with C. rather than D. sticking to
18. A. city B. university C. office D. countryside
19. A. disturbed B. content C. concerned D. curious
20. A. know about B. argue about C. find out D. care about
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下面的一段文章为课文原文的浓缩，仔细阅读，根据原文章内容将其补充完整，并尽量背诵。
Timoteo is a gentle 46-year-old man who lives in a village near the most dangerous part of a road in Bolivia．The road is in bad 1 because it is in high mountains, which rise steeply, and have a 2 drop on the other side．Anyone who can survive from such a travel is lucky． 3 average, one vehicle comes off the road 4 two weeks． 5 Timoteo, the death toll has fallen．Every morning he climbs up to the bend with a large circular 6 in his hand, which is red on one side and green 7 ．When two vehicles approach from opposite 8 , they can not see each other and the situation may be 9 ．But they can see Timoteo．In this way Timoteo 10 the traffic．Actually Timoteo is a 11 , and nobody asks him to do so．Only a few drivers give him a tip which is just enough for him to live on, but most of them just 12 , because they take it 13 ．
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