Question IV. Give the correct form of the word in bracket.

11. Mr. John plays the guitar very ………                                               (GOOD)                

12. The problem of air ………………in our city is worse and worse     (POLLUTE)

13. Tet is one of the most important …………..…in Viet Nam              (CELEBRATE)                       

14. Hoa is …………..and kind so everyone likes her                               (BEAUTY)

15. He is the best …………….in our group.                                             (SING)