For years we have believed we were either healthy or sick. (55) , during the mid-90s, scientists developed a new concept called "sub-health", a status (56) health and illness. The concept of sub-health has become (57) because it has helped to explain many health problems. (58) one study, only 5. 6% of people in the overall population are actually sick, (59) the subhealthy group consists of about 60%, and the (60) population is considered healthy. (61) of one’s sub-health will help one to be alert to the underlying disease and remain healthy. Sub-health is a state in which the body is (62) turning from health to illness or from illness to health. Our bodies are actively (63) the conditions of health, sub-health and disease. Factors (64) aging, internal or external toxicity (毒性), and body or mind exhaustion may cause sub-health, but taking good care of the body can change a sub-healthy status to a healthy one.
59().
A.However
B.Besides
C.Therefore
D.Meantime
参考答案：A
解析：
本题测试连词的使用。文中第一句“多年来我们一直认为，我们要么是健康的，要么是不健康的。”紧接着第二句空格后说：“90代中期，科学家们提出了一个全新的概念‘亚健康’。”很明显，此处应选择转折连词。however意为“然而”；besides意为“另外”；therefore意为“因此”；meantime意为“同时”。故选A。