Here are the matched sentences with their corresponding tag questions:

1. **Mendy is good at playing the piano,** **isn't she?**
2. **You went to the shopping centre with your family,** **didn't you?**
3. **Sharon's got a lot of toys in her room,** **hasn't she?**
4. **Mr. Brown walks to work every morning,** **doesn't he?**
5. **Come and have a look at our Mathematics project,** **won't you?**
6. **You haven't sent those letters I gave you,** **have you?**
7. **The cat sleeps in the blue basket over there,** **doesn't it?**
8. **She'd like to live in a bigger and better house,** **wouldn't she?**
9. **He can write the summary of this fairy tale,** **can't he?**
10. **Martin had a great time at the amusement park,** **didn't he?**
11. **The blue whales are the biggest animals on earth,** **aren't they?**
12. **The Johnsons aren't new in this neighbourhood,** **are they?**

Feel free to ask if you need further assistance!