Question

Перевести из активной формы в пассивную 1)We have already washed the pipettes. 2)His supervisor offered him the theme of his research 3)They showed her the easiest way to do it. 4)Buffer keeps the pH constant. 5)Boris hadn't done this research before his assistant helped him. 6)In the 1 century they started these engines by hand.Now they start them by electricity. 7)The Primary opened the new research center

Answer 1

Ответ:

1)Thd pipettes were already washed.

2) The theme of research was offered by his supervisor.

3)The easiest way to do it was showed.

4)The pH constant is kept by buffer.

5)This research wasn't done by Boris before his assistant helped him.

6)These engines was started by hand in the 1 century. Now they started by electricity.

7)The new research center was opened by the Primary.

Объяснение:

Answer 2

1. The pipettes have already been washed by us.
2. The theme of his research was offered to him by his supervisor.
3. She was shown the easiest way to do it by them.
4. The pH is kept constant by the buffer.
5. This research hadn't been done by Boris before his assistant helped him.
6. In the 1st century, these engines were started by hand. Now they are started by electricity.
7. The new research center was opened by the Primary.