Mình gửi đáp án bạn nhé : 

$1$. Sports and games play a very important role in our lives.

$2$. Dave is better at Maths than Mary ( Dạng câu so sánh hơn ) 

$3$. This is the first time I have eaten this food  ( Cấu trúc thì HTHT )

$4$. I began to study  English 3 years ago . ( Bắt đầu làm gì cách đây bao lâu)

$5$. I haven't cut my hair since I left her. ( Tôi chưa từng cắt tóc từ khi tôi gặp cô ấy )

$6$. How long have you leanrt English ? 

$7$. How long have you had it ?

$8$. I haven't written to my uncle since July .

$9$. The last time I saw him was 8 days ago .

$10$. We have become close friend for a long time . 

`1.` Sports and games are very important in our lives.

`2.` Dave is better at Maths than Mary

`3.` This is the first time I've eaten this kind of food.

`4.`I began studying English three year ago 

`5.`I haven't had my hair cut since i left her

`6.`How long have you learnt English?

`7.`How long have you had it?

`8.`I haven't written to my uncle since July.

`9.`The last time I saw him was 8 days ago

`10.`We have not met for a long time