B. the test that may be able to show cancer very early in its development,.

　　C. a simple medical test that cannot find cancer when it is -small

　　D. a new test that could be a step to develop a difficult way

　　3. 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 the best way to determined whether a person has cancer or not.

　　D. Cancers have nothing to do with a person’s habits and living conditions.

　　4. What would be the best title for the passage?

　　A. A simple way to cancer

　　B. Cancers can be cured

　　C. How to find cancer

　　D. Early discovery of cancer

　　1. B 细节题。从第一段中的cancers 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。

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