题目内容:
Questions 19 to 21 are based on the conversation you have just heard,
A.Conducting a training session for security guards. B.Interviewing a person for a job.
C.Giving a sales talk on alarm systems.
D.Asking a coworker some questions.
参考答案:【答案仅供学习,请勿对照自行用药等】
答案解析: