Viết lại các câu sau đây dựa vào các từ gợi ý sao cho nghĩa không đổi

8. This is the first time we have sung some English songs together
-> We have never …………………………...............
9. The last time Sam met her father was 2 days ago
-> San hasn’t
10. It is very interesting for him to ride a horses
-> Riding a horse is ………………………...............