3. Вставьте вместо пропусков глагол to be или to have в соответствующей форме:
1.She … a schoolgirl last year.
2. I … many interesting text-books in the English language.
3. We … Russian students.
4. Chemistry … a difficult subject.
5. Our town … many secondary and higher schools.
6. He … a laboratory worker at a chemical plant before entering the institute.