This is your chance to practice question tags, isn't it?
Questions tags are a common way to make questions, aren't they?
You know how to use them, don't you?
You can't get all 11 correct, can you?
Chris thinks you will make a mistake, doesn't he?
This is a large question mark, isn't it?
Question tags are often used in spoken English. A rising intonation is used to show that the question is real, whereas a falling intonation shows that the speaker just wants confirmation from the person being spoken to.