Unit 4 Astronomy- the science of the stars reading课时作业

第一节：完形填空(共20小题；每小题1.5分，满分30分)

　　阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。

　　As the pace of life continues to increase, we are fast losing the art of relaxation. __1__ you are in the habit of rushing through life, being on the go from morning till night, it is hard to __2__ down. But relaxation is __3__ for a healthy mind and body. Stress is a __4__ part of everyday life and there is no way to __5__ it. In fact, it is not the bad thing that it is often supposed to be. A __6__ amount of stress is important to provide motivation and give __7__ to life. It is only when the stress gets out of control __8__ it can lead to poor performance and __9__ health.

　　The amount of stress a person can bear __10__ very much on the individual. Some people are not afraid of stress. And such __11__ are obviously chief material for managerial responsibilities. Others lose heart at first __12__ of unusual difficulties. When exposed to stress, in __13__ form, we react both chemically and physically. In fact we make a choice between __14__ and fight. And in more ancient days the choices made the __15__ between life and death. The crisis(危机)we meet today are __16__ to be so extreme, but however little the stress, it requires the same response. It is when such a reaction __17__ long, through continued exposure to stress, that health becomes __18__. Such serious conditions as high blood pressure and heart diseases have __19__ links with stress. __20__ we cannot remove stress from our lives we need to find ways to deal with it. It would be unwise to do so even if we could.

　　So what do you think of stress? What is your way to deal with it?

　　1. A. When B. While

　　C. Once D. As

　　2. A. slow B. calm

　　C. get D. turn

　　3. A. unnecessary B. satisfied

　　C. useful D. necessary

　　4. A. physical B. natural

　　C. hard D. terrible

　　5. A. tolerate B. solve

C. avoid D. accept