I. Поставьте существительные, заключенные в скобках, во множественное число; произведите все необходимые изменения в

1. These investigators are the good specialists. 2. My brother\'s children are the school-boys. 3. Those women are the teachers. 4. These higher schools are not the only schools in my city. 5. The new houses are very nice. 6. Those cities are very old. 7. These young men are my sister\'s friends. 8. These students\' future professions are very interesting.