12. I find collecting glass bottles interesting.
-->I think_________________________________________________________
13. He has talent, so people admire him.
--> Because_______________________________________________________
14.We started donating books and clothes ten years ago
--> We _________________________________________________________
15. I find playing sports interesting.
-->I think_________________________________________________________
16. I think reading books is very useful
--> I find__________________________________________________________
17. Linh finds playing board games boring.
--> I think_________________________________________________________
18. We have learnt English for 4 years.
--> We started _____________________________________________________
19. My father started to give up smoking last year.
12. I find collecting glass bottles interesting.
-->I think collecting glass bottles is interesting.
13. He has talent, so people admire him.
--> Because he has talent so people admire him
14.We started donating books and clothes ten years ago
--> We have donated books and clothes for ten years
15. I find playing sports interesting.
-->I think playing sports is interesting.
16. I think reading books is very useful
--> I find reading books very useful
17. Linh finds playing board games boring.
--> I think playing board games are boring
18. We have learnt English for 4 years.
--> We started learning English 4 years ago.
19. My father started to give up smoking last year.
=> My father has given up smoking since last year.