2011英语四级预测试卷及答案解析(13)

Questions 29 to 32 are based on the passage you have just heard.
　　29. [A] In 1809.
　　[B] In 1863.
　　[C] In 1865.
　　[D] In 1860.
　　30. [A] Four years.
　　[B] Five years.
　　[C] Three years.
　　[D] Six years.
　　31. [A] A soldier.
　　[B] A thief.
　　[C] A government officer.
　　[D] An actor.
　　32. [A] Because they didn't like Lincoln being their President.
　　[B] Because they wanted to set up their own government.
　　[C] Because they disagreed with Lincoln on the abolishment of slavery.
　　[D] Because they wanted to stage a war against Lincoln's government.
　　Passage Three
　　Questions 33 to 35 are based on the passage you have just heard.
　　33. [A] 10 points.
　　[B] 2 points.
　　[C] 15 points.
　　[D] 5 points.
　　34. [A] They will take one of the six major tests.
　　[B] They will have to write a composition.
　　[C] They will be given a pop test.
　　[D] They will be required to read a short story in class.
　　35. [A] An essay.
　　[B] A magazine article.
　　[C] A poem.
　　[D] A short story.
　　Section C
　　Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information. For these blank, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written.
　　Scientists have developed a new cancer drug. So far, they have tested it only on (36) ________ animals. The drug is designed to (37) ________ and kill cancer cells but not healthy cells.
　　First, the drug enters the cancer and destroys the supply of blood. Then it releases (38) ________ to destroy the cancer cells.
　　Researchers at the Massachusetts Institute of Technology in Cambridge carried out the study. The (39) ________ appeared in Nature (40) ________. A school news release called the drug an "anti-cancer smart bomb."
　　Ram Sasisekharan is a professor at M.I.T. He says his team had to (41) ________ three problems. They had to find a way to destroy the blood vessels, then to (42) ________ the growth of new ones. But they also needed the blood vessels to supply chemicals to destroy the cancer.
　　So, the researchers designed a two-part "nanocell". The cell is (43) ________ in nanometers, or one thousand millionth of a meter. (44) ________________________.
　　The scientists say it was small enough to pass through the blood vessels of the cancer, but it was too big to enter normal blood vessels. The surface of the nanocells also helped them to avoid natural defenses.
　　(45) ________________________. That cut off the blood supply and trapped the nanocell inside the cancer. Then, the nanocell slowly released chemotherapy drugs to kill the cancer cells.
　　(46) ________________________.