A. had repeatedly complained to his employer B. did not get any response from his employer C. was concerned about public security D. became brave after the 9.11 disaster 参考答案:C 答案解析:[定位] 第2段最后两句。 [解析] 作者在第2段末句提到航空管理局的雇员,是为了举例说明该段倒数第2句,由此可推断,该雇员经历了9.11事件之后,出于对公众安全问题的关注,他把雇主的不当行为举