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 differences 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 young.

　　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 don’t

　　.

　　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.

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