21.- ... your aunt a doctor? — Yes, she ... . a) are, am b) am, is c) is, is 22. ... they at home? — No, they ... not at home, they ... at work. a) is, are, is b) are, are, are c) am, is, are 23. My brother ... a worker. He ....

21.- ... your aunt a doctor? — Yes, she ... . a) are, am b) am, is c) is, is 22. ... they at home? — No, they ... not at home, they ... at work. a) is, are, is b) are, are, are c) am, is, are 23. My brother ... a worker. He ... at work. a) is, is b) am, are c) is, are 24. ... you an engineer? — Yes, I .... a) is, am b) are, am c) is, are 25. ... your sister a typist? — No, she ... not a typist, she ... a student. a) are, are, are b) is, am, am c) is, is, is 26. ... your brother at school? — Yes, he ... . a) is, is b) are, am c) are, are 27. ... your sister at school? — No, she ... not at school. a) are, am b) is, is c) are, is 28. ... this your watch? — Yes, it ... . a) are, is b) is, are c) is, is 29. My uncle ... an office-worker. a) are b) is c) am 30. Helen ... a painter. She has some fine pictures. They ... on the walls. She has much paper. It ... on the shelf. The shelf ... brown. It ... on the wall. Helen has a brother. He ... a student. He has a family. His family ... not in St. Petersburg, it ... in Moscow. a) is, are, is, is, is, is, is, is b) are, is, is, is, am, am, am, are c) are, am, is, is, is, are, am, are