1. use present perfect.
1) she dishes. ( wash)
2) they teeth. ( clean)
3) tom and jess film. ( see)
4) i a letter to my friend. (write)
5) my cousin his book. (not find).
6) i can’t find sweets! who the sweets? (eat)
7) mike his homework and now is playing in the yard. (never do)
8) we 3 lessons of maths! ( have)
9) our class the kremlin. ( visit)
10) susan a tasty cake for her birthday. (make)
11) you the book by kipling. ( never read)
12) jack his tea. (drink)
13) we a lot of english words. ( learn)
14) he to a new song. (never listen) .

Поставьте предложения в отрицательную форму. 
1. She didn't spend a week in the Alps.
2. He doesn't write letters every day.
3. I don't work in the bank.
4. I didn't play tennis in the morning.
5. Next week he won't visit his grandfather.
6. Columbus wasn't born in Genoa.
7. I am not going to pay for the lunch today.
8. She doesn't have a new car.
9. Eric and Line don't like to get up early.
10. There is no telephone in this room.

Составьте вопросы к следующим предложениям
1. Does he work a language school?
2. Did I leave school when I was sixteen? 
3. Are you going to have a big breakfast today?
4. Is she married?
5. Is it hot today?
6. Do I get to work by bus?
7. Are they going to buy a very small flat?
8. Was I at home yesterday morning? 
9. Did he see three new films last month?
10. I don't like spaghetti, do I? 

Вставьте недостающее по смыслу слово
1. How old is she?
2. Did you go swimming yesterday?
3. He had a long hair before, but now he wears short hair.
4. He has got a cat, because he doesn't like dogs.
5.Jim always has a shower in the morning.
6. Where do you have French?
7.Mum goes shopping every day.
8. What music does she like best? Jazz.

View of the demographic crisis, which is characterized by an excess of the resource population, lack of resources to maintain the hygiene of life due to lack of funds on the part of community life. Overpopulation - a relative value, depending on the resource base of the territory of residence of the population, and also includes an assessment of the issuance and renewal of sources of means of subsistence.It is estimated by various methods1) A simple estimate: the ratio of the measured population to land area, given the volume of the surface of the soil on which it lives;2) Regenerative rate: the ratio of the rate of resource consumption of the population to the rate of renewal of these same resources, net of the amount of resources that need to maintain ecosystems and regenerative nature of the system (in accordance with the position of the overpopulation of the Earth's population will be over 25 billion3) A summary of expansion options: estimated ratio of population growth to the rate of progress, which provides the possibility of the emergence of new sources and the potential to expand the resource base.