7. He is better at English than me. (câu này sai ngữ pháp)

8. prettier than. 

9. more expensive than.

10. more delicious than.

11. more attractive than.

12. more luxurious than.

13. more expensive than.

14. more expensive than.

15. heavier than.

7)

      He is (good) at English me.

=> He is better at English than me. 

8)

      Lan is (pretty) her mother.

=> Lan is prettier than her mother.

9.

      This pen is (expensive) that pen.

This pen is more expensive than that pen.

10)

      Those apples are (delicious) these apples.

=> Those apples are more delicious than these apples.

11)

      Ms Hoa is (attractive) Mrs Lan.

=> Ms Hoa is more attractive than Mrs Lan.

12)

      This car is (luxurious) that car.

=> This car is more luxurious than that car.

13)

      Living in Valencia is not (expensive) living in Paris is.

=> Living in Valencia is not more expensive than living in Paris is.

more expensive than.

14)

      A bicycle is not (expensive) a car.

=> A bicycle is not more expensive than a car.

15)

      A horse is not (heavy) an elephant.

=> A horse is not heavier than an elephant.