题目内容：
Questions 36 to 45 are based on the following passage.Fear can be an effective way to change behavior. One study compared the effects of high-fear and low-fear appeals on changes in attitudes and behaviors related to dental hygiene (卫生). One group of subjects was shown awful pictures of___ 36___ teeth and diseased gums; another group was shown less frightening materials such as plastic teeth, charts, and graphs. Subjects who saw the frightening materials reported more anxiety and a greater___37 ___to change the way they took care of their teeth than the low-fear group did.
But were these reactions actually___ 38 ___into better dental hygiene practices? To answer this important question, subjects were called back to the laboratory on two___ 39___ (five days and six weeks after the experiment). They chewed disclosing wafers (牙疾诊断片) that give a red stain to any uncleaned areas of the teeth and thus provided a direct___40 ___of how well they were really taking care of their teeth. The result showed that the high-fear appeal did actually result in greater and more___ 41___changes in dental hygiene. That is, the subjects___42 ___to high-fear warnings brushed their teeth more___ 43 ___than did those who saw low-fear warnings.
However, to be an effective persuasive device it is very important that the message not be too frightening and that people be given___ 44 ___guidelines to help them to reduce the cause of the fear. If this isn't done, they may reduce their anxiety by denying the message or the___ 45___of the communicator. If that happens, it is unlikely that either attitude or behavior change will occur.
第36题_________
参考答案：
答案解析：