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1、阅读理解。阅读理解。阅读下列短文, 从给的四个选项 (A、B、C 和 D) 中, 选出最佳选项。There are various reasons why cancers appear to be on the increase. For one thing, though their sufferers are to be found in all age groups, cancers are particularly likely to attack persons in their middle and advanced years. Naturally, since people l
2、ive longer these years, there are more cancer sufferers than before. Again, with better methods of diagnosis (诊断), doctors can more easily recognize cancerous growths that would formerly have passed unnoticed or that would have been wrongly diagnosed. It is also believed that certain habits and cond
3、itions of modem living, including heavy smoking and the pollution of the air, may leave people living in more cancer-causing conditions than before.We all look forward to the day when a simple medical test can find cancer while it is still small. Researchers around the world are working on such a te
4、st. Most of their work deals with the examination of the blood.Researchers in Boston have found something in the blood of cancer patients that does not appear in healthy persons. The test showed which persons had cancer and which did not. It was correct more than 90 percent of the time.The researche
5、rs believe the test may be able to show cancer very clearly in its development. Cancers discovered early usually can be treated successfully.The test examines very small bits of fat in the blood called lipids (脂质). Cancers seem to change lipids although doctors do not know why. The test showed diffe
6、rences between the lipids of the persons with cancer and the lipids of those without cancer.The researchers say the new test could be a step to develop a simple way to check patients for cancer before the disease shows on an X-ray.1. Who will fail cancer from the study of the researchers?A. The youn
7、g. B. The middle age and the older.C. The man. D. The woman.2. The underlined words “such a test“ refer to_.A. the test that shows which persons have cancer and which dont .B. the test that may be able to show cancer very early in its development,.C. a simple medical test that cannot find cancer whe
8、n it is -smallD. a new test that could be a step to develop a difficult way3. Which of the following statements is true according to the passage?A. Cancers have much to do with something in patients blood.B. People living in better conditions are most likely to be attacked by cancer.C.X-raying is th
9、e best way to determined whether a person has cancer or not.D. Cancers have nothing to do with a persons habits and living conditions.4. What would be the best title for the passage?A. A simple way to cancer B. Cancers can be curedC. How to find cancer D. Early discovery of cancer1. B 细节题。从第一段中的 can
10、cers are particularly likely to attack persons in their middle and advanced years 可以知道癌症尤其容易在中年人和老年人的身体上发生。2. B 词义题。第二段中的 a simple medical test can find cancer while it is still small；test 与后面的 such a test 指的是同样的一种方法，所以这里的 test 指的是上句的“用最简单的方法诊断早期的癌症”。3. A 细节题。第三段中提到了 cancer 病人血液中的有些东西在健康人中没有，并且百分之九十
11、以上的情况是这样的。B 项与 D 项的意思与文章第一段中的 certain habits and conditions of modern living including heavy smoking and pollution of the air may leave people living in more cancer-causing conditions 不符；C 项内容与文章最后一段的意思不符。4. D 主旨题。文章在开头就交代了写作的目的，有各种不同的理由说明了为什么癌症似乎在上升，而从后面的几段我们知道科学家们正在研究一种新的早期诊断 cancer 的方法。阅读下列短文，从每题
12、所给的四个选项（A、B、C 和 D）中，选出最佳选项。The diversity of the original American Indian settlers was not quite as great as that of the 18th, 19th and early 20th centuries when waves of European, Asian and unwilling African immigrants arrived on American shores. However, the First Americans did have more far-going
13、origins that were ever suspected. For example, Braces studies have revealed that the Blackfoot, Iroquois, and other tribes from Minnesota, Michigan, Ontario, and Massachusetts came down from the Jomon, a prehistoric people of Japan. The Inuit in the far north and tribal groups who once lived down th
14、e Eastern seaboard into Florida appear to be a later branch from the trunk of the Jomon family tree. The Athabaskan-speaking people from the Yukon and northern-western Canada, who spread as far south as Arizona and northern Mexico, appear to trace their origins to China. “Their facial shapes link th
15、em more closely to the living Chinese than to any other population in either part of the world,” says Brace.Johanna Nichols, a Professor of Slavic languages and literature at the University of California at Berkeley, says that new evidence from native languages throughout the New World strongly sugg
16、ests that humans have been in the Americas since as early as 40,000 BC. She says that it is only along the west coast that languages appear to have come from immigrants who arrived after the ice age, 14,000 years ago.Nichols also has some different ideas about the direction in which the country was settled. Breaking with the traditional view of migrations, she says that the inside of North America was colonized not only from Siberia but al
