1. Ann isn't a journalist. 2. This student doesn't have a good memory. 3.
Professor Smith and Professor Black aren't colleagues. They areren't
economists. 4. The secretary isn't in the office. 5. Bill hasn't got questions
to the lecturer. 6. Lecture halls aren't on the second floor. 7. The problem isn't
difficult. 8. We don't have lectures on Friday. 9. A scientist isn't an expert
in natural sciences. 10. A scholar isn'r an expert in the humanities. 11. She
isn't a student. 12. You don't have a sister.
1. Is Ann a journalist? 2. Does this student have a good memory? 3. Are Professor
Smith and Professor Black colleagues? Are they economists? 4. Is the secretary in
the office? 5. Has Bill got questions to the lecturer? 6. Are lecture halls on
the second floor? 7. Is the problem difficult? 8. Do we have lectures on Friday?
9. Is a scientist an expert in natural sciences? 10. Is a scholar an expert in
the humanities? 11. Is she a student. 12. Do you have a sister?