参考答案：许多雇员可以认为，他们白天工作时正在受到监视。大多数美国公司使用摄像机、录音机和电脑监视器等监视员工。

解析：[听力原文]
Many employees can assume that they’ re being watched while they work during the day. The majority of U. S. companies keep watch on their workers with video cameras, tape recorders, computer surveillance.