第7题: [单项选择]According to the author, knowing the cause of the misery will help ______ A. shorten the duration of the illness B. the patient buy medicine over the counter C. the patient obtain cheaper prescription drugs D. prevent people from catching colds and the flu 参考答案:A 答案解析:根据第一段的最后一句话“but being able to tell if the cause is a cold or flu may make a difference in how long t