第17题: [单项选择]For some people, it may be better A. to wear a seat belt for health reasons. B. not to wear a seat belt for health reasons. C. to get a valid medical certificate before wearing a seat belt. D. to pay a fine rather than wear a seat belt. 参考答案:B 答案解析:[解析]之所以人们要使用医院证明,就是因为他们健康方面的原因,不能戴安全带。故应选B。