The alarm was set off by the motion detector
We plan to set off on our journey early tomorrow
The fireworks set off a chain reaction of celebrations
Her new dress really set off her blue eyes
The smell of baking bread set off a wave of hunger
He decided to set off on his own to find a new job
The speaker's controversial remarks set off a heated debate
The bright colors of the painting set off the dull walls
Let's set off some fireworks to celebrate
The police were alerted after the alarm was set off
Did you set off the alarm by mistake?
No, I was very careful this time.
Good, I did not want any trouble.
The fireworks set off a chain reaction of cheers
The fireworks triggered a loud reaction from the crowd
The fireworks caused the crowd to erupt in cheers