Question

Your parents never travel by plane,..... ?

don't they
do they
have they
didn't they​

Answer 1

Ответ:

Your parents never travel by plane, do they?

Объяснение:

Answer 2

Ответ:

don't they

Объяснение:

Так как вопрос стоит в Present Simple, мы используем Do. В отрицательной форме Don't.