2. 外语
  3. The concept of personal choice in relation to health behaviors is an important one. An estimated 90 percent of all illness may b

The concept of personal choice in relation to health behaviors is an important one. An estimated 90 percent of all illness may b

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问题      The concept of personal choice in relation to health behaviors is an important one. An estimated 90 percent of all illness may be【C1】______ if individuals would make sound personal health choices【C2】______ upon current medical knowledge. We all enjoy our freedom of choice and do not like to see it【C3】______ when it is within the legal and moral boundaries of society. The structure of American society allows us to make almost all our personal decisions that may【C4】______ our health. If we【C5】______ desire, we can smoke, drink excessively, refuse to wear seat belts, eat【C6】______ foods we want, and live a【C7】______ sedentary(久坐的)lifestyle without any exercise. The freedom to make such personal decisions is the fundamental【C8】______  of our society,【C9】______ the wisdom of these decisions can be questioned. Personal choices relative to【C10】______ often cause a difficulty. As one exampie, a teenager may know the facts relative to smoking cigarettes and health but may be【C11】______ by friends into believing it is a socially 【C12】______ thing to do.
     A 【C13】______ of factors, both inherited and environmental, influence the development of healthrelated behaviors, and it is【C14】______ the scope of this text to discuss all these factors as they may affect any 【C15】______ individual. However, the decision to adopt a particular health-related behavior is【C16】______ one of personal choices. There are healthy choices and there are unhealthy choices. Experts suggest that to knowingly give【C17】______ over to a behavior that has a statistical probability of【C18】______ life is similar to attempting suicide.【C19】______ , personal health choices should【C20】______ those behaviors that are associated with a statistical probability of increased vitality and longevity.  
【C19】
选项 A、Thus
B、However
C、Unless
D、Though
答案A
解析 副词辨义 。本句与上句是因果关系，这里只有thus表示因果关系。
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