Grammar question tags

Grammar question tags. Match the following sentences to the right question tags.

You've called the plumber,	??? isn't he? is he? is it? are they? isn't it? haven't you? can't we? aren't they? have you? do we?
They're coming tomorrow,	??? isn't he? is he? is it? are they? isn't it? haven't you? can't we? aren't they? have you? do we?
This isn't going to be cheap,	??? isn't he? is he? is it? are they? isn't it? haven't you? can't we? aren't they? have you? do we?
You haven't finished packing,	??? isn't he? is he? is it? are they? isn't it? haven't you? can't we? aren't they? have you? do we?
We don't need any more boxes,	??? isn't he? is he? is it? are they? isn't it? haven't you? can't we? aren't they? have you? do we?
Chris is going to help us,	??? isn't he? is he? is it? are they? isn't it? haven't you? can't we? aren't they? have you? do we?
We can put some things in the car,	??? isn't he? is he? is it? are they? isn't it? haven't you? can't we? aren't they? have you? do we?
Tom isn't selling his car,	??? isn't he? is he? is it? are they? isn't it? haven't you? can't we? aren't they? have you? do we?
The student's aren't preparing for the exam,	??? isn't he? is he? is it? are they? isn't it? haven't you? can't we? aren't they? have you? do we?
Passing the exam is hard,	??? isn't he? is he? is it? are they? isn't it? haven't you? can't we? aren't they? have you? do we?