IV. Give the correct form of the verbs in brackets: 18. The most popular after-school ... in VietNam are foootball and badminton. (act) 19. The city library has over 60 ... (employ) 20. English is an ... and important subject. (interest) 21. Science books are very ... for our study of the world. (use) 22. Ba is a famous stamp ... (collect) 23. They learn to play a ... instrument. (music)
