填空题

As the pace of life continues to increase, we are fast losing the art of relaxation. Once you are in the habit of rushing through life, being on the go from morning till night, it is hard to slow down. But relaxation is (47) for a healthy mind and body.
Stress is a natural part of everyday life and there is no way to (48) it. In fact, it is not the bad thing it is often (49) to be. A certain amount of stress is vital to provide (50) and give purpose to life. It is only when the stress gets out of control that it can lead to poor (51) and bad health.
The amount of stress a person can put up with depends very much on the individual. Some people are not afraid of stress, and such characters are (52) prime material for managerial responsibilities, others lose heart at the first sign of unusual difficulties. When exposed to stress, in whatever form, we (53) both chemically and physically. In fact, we make choice between "flight and fight" and in more (54) days the choices made the difference between life and death. The crises we meet today are unlikely to be so (55) , however little the stress, it involves the same response. It is when such a reaction lasts long, through continued (56) to stress, that health becomes endangered. Since we can’t remove stress from our lives, we need to find ways to deal with it.
A) exposure F) expression K) essential
B) perspective G) performance L) obviously
C) motive H) avoid M) primitive
D) react I) exterior N) extreme
E) especially J) supposed O) surrender