英语四级选词填空练习及答案解析

　　下面小编跟大家一起了解英语四级选词填空练习及答案解析，希望对大家的学习有所帮助。
　　The amount of stress a person can __15__ depends very much on the individual. Some people are not afraid of stress, and such characters are __16__ prime material for managerial responsibilities. Others lose heart at the first signs of __17__ difficulties.
　　When exposed to stress, in whatever form, we react both chemically and physically. In fact we make choice between "fight" or "flight" and in more primitive days the choices made the difference between life or death.

　　The crises we meet today are unlikely to be so __18__ , but however little the stress, it involves the same response. It is when such a reaction lasts long, through continued __19__ to stress, that health becomes endangered. Such serious conditions as high blood pressure and heart disease have established links with stress. Since we cannot __20__ stress from our lives(it would be unwise to do so even if we could) , we need to find ways to deal with it.