单选题
Lowering the Risk of Heart Disease

Like millions of other Americans, I come from a family with a history of the heart disease. My father had his first three heart attacks when he was only thirty-one. I was three years old at that time. I grew up with heart disease. It was there, but I didn"t take it seriously.
When I was thirty-one, my blood cholesterol (胆固醇) level was measured for the first time. It was 311 mg/dl, the doctor told me-an extremely high level that put me at a very high risk of heart disease, especially with my family history. He sent me to the National Institutes of Health (NIH) to be screened for participation in a clinical trial. The trial was designed to test the effect of lowering blood cholesterol on the risk of heart disease.
At NIH, physicians explained the degree of risk associated with my blood cholesterol level and the nature of the experiment. This test involves putting a tube through a leg artery (动脉) up to the heart. The death rate for the test was only 1 in 100, I was assured.
Learning about the risks of the experiment as well as the risk associated with my raised blood cholesterol level scared the life out of me. Although I was excluded from participating in the study, the experience may well have saved my life.
For the first time, I began to realize the seriousness of high blood cholesterol. It was a heart attack just waiting to happen. But equally important, I got a taste of what it is like to be a patient, to have tests done on me and to think of myself as sick. This was hard to take.
This experience taught me two lifesaving lessons. First, although I felt fit and strong, I was actually at high risk for heart disease because of my high blood cholesterol level. And with my family history, it could not be ignored. Second, I could lower my blood cholesterol level simply by changing what I ate.
单选题 The writer had heart disease because ______.
【正确答案】 B
【答案解析】[解析] 由文章第一段第一句中的“I come from a family with a history of the heart disease.”可知，作者的心脏病是遗传的。故选B。
单选题 Which of the following statements is NOT true?
【正确答案】 D
【答案解析】[解析] 由文章第二段第一句可知，作者在31岁之前没有测量过血液中的胆固醇含量，故A项正确。由第二段第二句可知，医生说作者患心脏病的风险很高，故B项正确。由第一段第一句可知，作者的心脏病有家族史，故C项正确。由第二段第二句可知，作者的血液中胆固醇含量高和心脏病家族史会导致其患上心脏病，所以D项的说法“作者患心脏病的风险很高，仅仅是因为家族史”是错误的。
单选题 What did the doctor ask the writer to do?
【正确答案】 A
【答案解析】[解析] 由文章第二段第三句“He sent me to the National Institutes of Health(NIH)to be screened for participation in a clinical trial.”可知，医生让作者去美国卫生研究所做一下临床试验。故选A。
单选题 What did the writer know from his experience?
【正确答案】 B
【答案解析】[解析] 文章最后一段讲到，作者从他的经历中得到了两个能挽救其生命的信息：其一是虽然自己觉得强壮，但是仍然有患心脏病的风险，因为他血液中胆固醇含量过高，并且有不容忽视的家族史；其二是他可以通过改变饮食结构来降低血液中胆固醇的含量。故选B。
单选题 How could the writer lower his blood cholesterol level?
【正确答案】 D
【答案解析】[解析] 由文章最后一句“Second，I could lower my blood cholesterol level simply by changing what I ate.”可知，D项为正确答案。