A common mistake in English is using than or then in the wrong situation. They sound similar, but they have different meanings.
On this page, you have an exercise about the difference between than and then.
You can find the exercise below:
Than or Then Exercise 5
Complete the sentences by filling in the correct form: than or then.
1.
My sister wants to have dinner .2.
They have more work their competitors.3.
My professor is more intelligent my friend.4.
First eat breakfast and take a shower.5.
The new Samsung is cheaper the latest iPhone.6.
What is happening ?7.
The new Airpods work a lot better the previous versions.8.
Our teacher talks louder the principal.9.
Just , the lights went out.10.
They used to have a lot of money, but they have lost most of it since 
