Відповідь:

1. shall we?
2. should they?
3. won't they
4. have you?
5. didn't she?

Пояснення:

How to form a tag question?

First, look at the sentence.

1. While creating a question tag, pay attention to the subject from the main body (main body - основна частина).

E.g. Lilly has a car. The subject is Lilly.

They are cousins. The subject is they.

2. In the question tag, replace the subject with a personal pronoun. If it's already done, don't change anything:

Lilly ⇒ she

they ⇒ they

3. Determine whether the question will be positive or negative:

If the main body of the sentence is positive, the tag is negative.

If the main body is negative, the tag is positive.

Lilly has a car ⇒ the main body is positive

They are cousins ⇒ the main body is positive

4. To form a question tag we need a pronoun and an auxiliary verb (допоміжне дієслово).

The time in the question tag should match the time in the body. So, our sentences should look like this:

Lilly has a car, doesn't she?

They are cousins, aren't they?