4) You taught them last year, ? Yes, 5) Her parents are British, ? No, 6) She's the best student in the class, ? Yes,​

4) You taught them last year, didn't you?

Yes, I did.

5) Her parents are British, aren't they?

No, they aren't.

6) She's the best student in the class, isn't she?

Yes,​ she is.