`1.` In my opinion, the best leisure activity for teenagers is reading

- for + someone + be + V-ing 

`2.` Life in the city is busier than that in the country

- Cấu trúc so sánh hơn 

S1 + be + adj-er/more adj + than + S2

`3.` Which ethnic group has the second largest population in Viet Nam?

- Câu hỏi với từ which ( cái nào) 

- Which + Clause/N + (or) + Clause / N?

`4.` Many teenagers are addicted to the Internet and computer games

- S + be + addicted to + N

`5.` Peter prefers playing computer games in his free time

- S + prefers + V-ing

`6.` My father enjoys playing sports and reading books. 

- S + enjoy + V-ing

`7.` The teacher doesn't mind helping you with a difficult exercise

- S +  don't mind/ doesn't mind + V-ing

`8.` Jane doesn't fancy reading science books.

- S + don't fancy/ doesn't fancy + V-ing

`9.` Which kind of juice do you dislike the most?

- Which + Clause / N + ....?