Please include the reference mark in your document.

I always mark down the prices during the end-of-season sale.

The teacher gave him a black mark for his misbehavior in class.

‘Where is the library?’ ends with an interrogation mark.

I used a hash mark to tag my post on social media.

The company registered their service mark to protect their brand identity.

She has a strawberry mark on her arm.

The stress mark (`´) indicates the accent in the word.

Let's mark the occasion with a special celebration.

Mark Twain was a famous American writer.