题干：从以下词汇选出合适的，填入相应题号中。词的形式可以自行变换。

temporary，fear， extend， passive， require，substantial， count， instinctive， increase， lie， permanent， hardly， stiff， stick， adopt，hard，current， strength，off，on, standard

原文：“Use it or lose it" is the new approach to back pain. In the last few years, there has been a ___1___ change in the way doctors treat this most common disease. Weeks or months of rest in bed—the ___2___ method of treatment for so long—are now thought to be surely harmful. Muscles become soft, joints become ___3___ and what started out as a ___4___ acute condition quickly turns into a continuing disability. Far better, according to current thinking, is to put up with a little pain and get moving. 

The change has not happened overnight. For years, some specialists have had an ___5___ feeling that bed rest was not the answer. But what finally put an end to ___6____ bed rest was a study of more than 200 patients who were treated for back pain in a clinic in Taxes. Not only did patients who had two days" bed rest do totally as well as those given seven days, they ___7____ only half as much time altogether ___8____ work. 

As a result of the study, experts now recommend that ___9____ anyone with acute back pain should spend more than a few days ___10____ down. After that should come a program of gradually ___11____ exercise, probably accompanied by some ___12____ treatments such as massage, heat or ultrasound. 

Because of hospital waiting lists, most people have to wait several weeks before receiving the treatment they need. Unfortunately this wait is often spent in bed or inactive for ___13____ of doing further damage to the back. It has been estimated that for every day an injured muscle is rested it loses at least one percent of its ___14___. Stay in bed for two or three weeks and it will be far ___15___ to rebuild a damaged muscle.

以下是我自己做的答案：

1.substantial 2. standard 3. stiff 4. temporary 5.instinctive 6. adopt 7. required 8.没选出来(standardized) 9. currently 10. lying 11. increasing 12.passive 13. fear 14. strength 15. hardly还是harder？

书上答案感觉很多不合理，这里就不写了。

感谢老师指正～