第19题: [单项选择]Passage One Questions 26 to 28 are based on the passage you have just heard. A. It is difficult to detect online bullying. B. It is impossible to monitor bullying outside school. C. Online bullying is usually beyond teacher’s control. D. All above all. 参考答案:D 答案解析:[听力原文] Q: Why is the issue a problem [一点即通] 文章最后提到网络暴力在学校老师的控制范围之外,很难被发现。故选 D项。