II Найдите и выпишите 3 предложения в Present Simple и 3 - в Past Simple

Решение:

Present Simple:

1. Power engineers may work on the design and maintenance of the power grid as well as the power systems that connect to it.
2. Users purchase electricity from the grid avoiding the costly exercise of having to generate their own.
3. Such systems are called on-grid power systems and may supply the grid with additional power, draw power from the grid or do both.

Past Simple:

1. The age of electricity began with the work of Hans Christian Oersted (1777-1851), who demonstrated in 1819 that a current-caving conductor could produce a magnetic field.
2. Faraday demonstrated that it was possible to produce an electric current by means of a magnetic field and this subsequently led to the development of electric motors, generators and transformers.
3. In 1888 Nikola Tesla (1856-1943) at Columbus, Ohio, USA, invented the first induction motor which has become the basic prime mover to run the wheels of industry today.

Ответ: Приведены предложения из текста.