curriculum/challenges/english/blocks/learn-greetings-in-your-first-day-at-the-office/656d2aee945ce2137bd8b8b8.md
In many security systems, a sound is used to indicate a specific action.
In this dialogue, the click sound means that the door has been unlocked. The term lock refers to securing something, usually a door or a container, so that it cannot be opened without the correct key or combination. For example, you might lock your house when you leave to keep it safe.
Unlock means to open a lock, allowing access. In some places, when a door is unlocked, it might make a click sound as an indicator.
What does the click sound indicate about the door in the dialogue above?
It is locked.
Locked is the opposite of what the click sound indicates.
It is broken.
There's no mention of anything being broken.
It is making music.
The click is a simple sound, not a musical note.
It is unlocked.
4
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