Переведите предложения, учитывая значение местоимения it. Поставьте предложения в во форму и дайте краткий утвердительный или отрицательный ответ.
It is easy to discuss this question. It is very simple. 2. It was important to solve this problem. It occupied all his thoughts for hours. 3. It is necessary to boil water for our experiment. Then it will be pure. 4. It was not easy to define the properties of this solid. It took much time. 5. It is said that the lecture on physics was very intreresting today. The professor illustrated it with many experiments.