Английский язык. Ильичева Н.А - 30 стр.

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16. Choose the statements characterizing the following sources of energy.
   Fill in the boxes with suitable numbers. Talk with a partner about
   advantages and disadvantages of a particular source of energy.

Coal                   3
Oil
Gas
Nuclear energy
Hydropower

1. It is used primarily for the generation of electricity.
2. It is a clean-burning fuel used in heating as well as in business and industry.
3. It is the most abundant fuel supply with an estimated 300 – to 400 year
   reserve at the current consumption rate.
4. It presents a minimum pollution problems.
5. It is our most widely used source of energy. It is mainly used for
   transportation.
6. It is a controversial energy source whose opponents point out the possibility
   of an accident which may cause gross environmental contamination.
7. There may be enough of it only for the next 50 or 60 years.
8. Unfortunately, its use brings with it variety of environmental problems.
   Sulfur dioxide (двуокись серы) from its combustion is a major source of
   acid rains.
9. It is used not only as a fuel but also as a starting material for the
   petrochemical industry.
10. Most of the feasible locations for its generation have been utilized. If we
   start increasing its use, it will cause environmental problems.
11. It has the problem of waste disposal.
12. It has become increasingly important over the years. Some 15-20 percent of
   the electricity in the Unite Sates is generated by this source of energy. France
   generates more that 70 percent of its electricity by using it, and several other
   countries are not far behind.

Grammar in Use
                           Past Simple – Past Continuous

17. Identify the tenses in bold, then match them with the correct tense
   description. How is each tense formed? When do we use each tense?

1. He wound up the clock and hung it on the wall.
2. Margaret got off the train. Rain was falling heavily and a cold wind was
   blowing across the platform.
3. The bus was slowing down while the car was beginning to speed up.