Here are the answers for the exercises:
**Вариант 1:**
1. It is cold, isn't it?
2. He can't play football, can he?
3. We are good at Maths, aren't we?
4. He will make a snowman tomorrow, won't he?
5. She isn't going to be a dancer, is she?
6. They weren't in the zoo yesterday, were they?
7. We have got a big house, haven't we?
8. She must clean her teeth every day, mustn't she?
**Вариант 2:**
1. Peter likes to play football, doesn't he?
2. My kitten can't swim, can it?
3. We will go to Moscow next week, won't we?
4. Our group isn't responsible for the party, is it?
5. Kate went to the seaside a year ago, didn't she?
6. Nick didn't invite us to his party, did he?
7. Her friends sing well, don't they?
8. They can translate the text, can't they?