13. They... good students. a) am b) is c) are 14. I... at home. a) am b) is c) are 15. We... not from Oxford. a) am b) is c) are 16. My brother... at the lesson now. a) am b) is c) are 17. She ... a nice red cat. a) haves b) have c) has 18. I ... a cat. a) haves b) have 19. My friend... a dog. a) haves b) have c) has c) has​