Laura and Paul work as security guards. They face a technical problem. They must find the cause quickly before the deadline.
Vocabulary:
Alarm: A device that makes a loud sound to warn of danger.
Sensor: A device that detects changes like movement or heat.
Deadline: The latest time by which something must be done.
Root cause: The main reason for a problem.
Replace: To take out something and put in a new one.
Practice more with this lesson:
