2, existed 5, explored

3, have develop 6 saw

4 ,have found 7 stopped

8, caught 9 have always want

10 haven't think 11 have studied

12 said 13 have bought

14 showed

6/20:3=6/20x1/3=6/60=1/10

11h-8h30p=2h30p=2.5h

10 7/10-4 3/10

=107/10-43/10

=64/10=32/5

chúc bn học tốt!

3. He hasn't washed the dishes yet.

4. He hasn't watered the plants yet .

5. He has already done the shopping

6. He has already taken the dog for a walk

7. He has already ironed his clothes

8. He has already washed his car

9. He hasn't tidied the kitchen yet

10. He hasn't mended the kettle yet

3. He hasn't washed the dishes yet.

4. He hasn't watered the plants yet .

5. He has already done the shopping

6. He has already taken the dog for a walk

7. He has already ironed his clothes

8. He has already washed his car

9. He hasn't tidied the kitchen yet

10. He hasn't mended the kettle yet

cho minh hỏi sách gì vậy bạn,mình cảm ơn

11. Last summer I learned to play chess.

12. My neighbor plays very well and teaches me.

13. He is a teacher at the College of Technologies.

14. Then I often play chess with my friends in my free time.

15. Now I am playing quite well.

16. I think chess is a wonderful game.