Ii. переделайте следующие предложения, изменив activevoice на passive voice.предложения переведите на язык: 1. before the experiment we mix the substances in a large cup. 2. we study mathematics and physics in the first year at the institute. 3. we use electricity on a large scale. 4. we shall test the new engine in the laboratory.5. einstein provided a new conception of time, space and gravitation.

1. Перед экспериментом мы смешиваем вещества в колбах. 
Passive Voice: The substances are mixed by us.
2. В первый год обучения, мы изучаем математику и физику в университете.
Math and physics are studied by us.
3.Мы используем электричество в больших масштабах.
The electricity is used by us.
4. Мы проверим новый двигатель в лаборатории.
The new engine will be tested by us.
5. Эйнштейн представил новую концепцию времени, пространства и гравитации.
A new conception of time, space and gravitation was provided by Enstein.

The first analogues of chewing gum were pieces of resin that were found during excavations in ancient settlements. The Kurtis brothers of Maine started producing gum first . It was in the middle of the 19th century .They created chewing gum from pine resin mixed with bee wax. Although with the advent of rubber gum their popularity fell sharply A patent for the production of rubber gum was obtained in 1869 by William Finley Semple of Ohio Although he himself did nothing further, the rubber gum saw the light in the same year . The production of chewing gum was carried out by the entrepreneurial resident of the state of New York Thomas Adams By cheap buying a ton of rubber and not finding it better use, he at his own risk boiled a small piece of rubber at home and formed gum His next step was to change the taste qualities of this product through the addition of lacquer flavor. Since then, gum has firmly and seems to have forever become an unaltered attribute of our lives. . Good or bad, the question is controversial

The first analogues of chewing gum were pieces of resin that were found during excavations in ancient settlements. The Kurtis brothers of Maine started producing gum first . It was in the middle of the 19th century .They created chewing gum from pine resin mixed with bee wax. Although with the advent of rubber gum their popularity fell sharply A patent for the production of rubber gum was obtained in 1869 by William Finley Semple of Ohio Although he himself did nothing further, the rubber gum saw the light in the same year . The production of chewing gum was carried out by the entrepreneurial resident of the state of New York Thomas Adams By cheap buying a ton of rubber and not finding it better use, he at his own risk boiled a small piece of rubber at home and formed gum His next step was to change the taste qualities of this product through the addition of lacquer flavor. Since then, gum has firmly and seems to have forever become an unaltered attribute of our lives. . Good or bad, the question is controversial