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.
60().
A.within
B.between
C.toward
D.beyond
参考答案：B
解析：
本题测试介词。由常识可知，亚健康是介于健康与不健康之间的一种身体状态。within意为“在……里面”；toward意为“朝着……”；beyond意为“在……之外”。只有between…and…意为“在……之间”，所以B选项是正确答案。