Раскройте скобки, употребляя глаголы в present continuous. (now) 1. timothy (to feed) his dog. 2. mr. jones (to clean) his yard. 3. nancy (to paint) her kitchen. 4. our neighbours (to wash) their car. 5. i (to wash) my hair. 6. who (to fix) your sink? 7. what she (to do) now? — she (to dance 8. the children (to brush) their teeth. 9. what he (do) at the moment? — he (to fix) his bicycle.

1. Timothy (is feeding) his dog. 2. Mr. Jones (is cleaning) his yard. 3. Nancy (is painting) her kitchen. 4. Our neighbours (are washing) their car. 5. I (am washing) my hair. 6. Who (is fixing) your sink? 7. What is she ( doing) now? — She (is dancing). 8. The children (are brushing) their teeth. 9. What is he (doing) at the moment? — He (is fixing) his bicycle.

1. The letters have not been sent yet.
2. Have you sent the letters already?
3. I sent them tomorrow.
4. Please, make sure that the letters have been sent by tomorrow evening.
5. The letters were not sent yesterday because we forgot to buy stamps.
6. Finally the letters were sent.
1. The article was being when I came in the classroom.
2. The article has not been translated yet.
3. It was not translated yesterday, so it needs to be translated today.
4. If we do not finish it today, we shall  translate it tomorrow.
5. The article will have been translated by the end of the week.
6. If I am not mistaken, the article was translated some time ago.
7. I am afraid this article will never be translated.

1) People so often speak about ecology these day because this science is very important.

2)  Ecology is an important science because it deals with world-wide problems for humanity and it is a science about our environment.

3) People first started speaking about ecology in the 20th century.

4) It uses the information of zoology, biology, chemistry, geography and some other sciences.

5) There are a lot of problems and the most important are different kinds of pollution ( air, water, land ), global warming, destruction of ozon layer and many other problems.

6) It has a great impact on every living thing, for example when we pollute water in rivers and lakes fish die and many animals have lack of food if they  use fish as their food.

7) Human ecology studies the problems with nature which are connected with people.

8) My natural evironment isn't healthy. I live in a big city and it is very dirty because of cars and buses fumes. The air is bad and the soil is also polluted.