第46-50题，每题2分，共10分

1、阅读下面的短文，文章中有5处空白，文章后面有6组文字，请根据文章的内容选择5组文字，将其分别放回文章原有位置，以恢复文章原貌。请将答案涂在答题卡相应位置上。Lowering the Risk of HeartDiseaseLike millions of otherAmericans, I come from a family with a histotry of the heart disease. My fatherhad his first three heart attacks when he was only thirty-one._____________(46) I grew up with heart disease. It was there, but I didn’t takeit seriouly.When I was thirty-one, myblood cholesterol(胆固醇)level was measured for thefirst time.It was 311 mg/dl, the doctor told me- an extremely high level thatput me at a very high high risk of heart disease, especially with my familyhistory. He sent me to the National Institutes of Health(NIH)to be screened forparticipation in a clinical trial._____________(47)At NIH, physicians explainedthe degree of risk associated with my blood cholesterol level and the nature ofthe experiment. This test involves putting a tube through a leg artery(动脉) up to the heart._____________(48)Learning about the risks ofthe experiment as well sa the risk associated with my raised blood cholesterollevel scared the life out of me. Although I was excluded from participating inthe study, the experience may well have saved my life.For the first time, I began torealize the seriousness of high blood cholesterol.___________(49) But equallyimportant, I got a taste of what it is like to be a patient, to have tests doneon me and to think of myself as sick.This was hard to take.This experience taught me twolifesaving lessons. First, although I felt fit and strong, I was actually athigh risk for heart disease because of my high blood cholesterol level. Andwith my family histaory, it could not be ignored.________________(50)A Second, I could lower myblood cholesterol level simply by changing what I ate.B I was three years old atthat time.C There is not enough oxygenin the blood.D It was a heart attack justwaiting to happenE The trial was designed totest the effect of lowering blood cholesterol on the risk of heart disease.F The death rate for the testwas only 1 in 100, I was assured.

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