Перевести из актив в пассив 1. this unit performs different arithmetic operations. 2. our personnel have checked the result of the experiment. 3. my friend was compiling a program when i came to the laboratory. 4. they did many operations on the computer. 5. owing to the computer we could process a great deal of information.

1.different arithmetic operations are perfomed by this unit
2.The results of the experiment have been checked by our personnel
3.When I came to the laboratory a program was being compilled by my friend
4.many operations were made on the computer
5.owing to the computera great deal of information could been processed by us