Past Simple, Present Simple, Present Countinious Her dog often (to fight) with cats, because dogs and cats (to be) never friends. 2. The boys usually (to fly) a kite or a model plane? No, the children (to sunbathe) on the beach. 3. How you (to feel) yesterday after lessons? In fact, I (to feel) very tired, but I (to have) a little rest, (to see) an interesting film and then I (to begin) to do my lessons. 4. Tom (to take) great pictures of the Golden Gate Bridge yesterday. But your picture last year (to be) wonderful too. 5. Who (to make) all that noise in your room last night? My roommates (to listen) to music. They (to buy) a new disc yesterday. We (to like) loud music. 6. His little brother never (to cry) at night, so his parents (not to be) sleepy and tired every morning. 7. Your cousin (to play) violin? – Yes, he and his friend (to play) different musical instruments. 8. You (to sleep) well last night? - In fact, no. I (to think) till the morning: my head (to be) full of thoughts. When the morning (to come) I (to take) decision at last. 9. I (to see) Jack a few minutes ago. He (to be) in the park. 10. Your friends (to meet) you at the station yesterday? Yes, they always (to meet) me when I (to come) to their town. Yesterday they also (to come) to the station to meet me.

решение. 1. ri=2*r; rii=r/2; ri/rii=4; не надо ни о какой площади сечения говорить. два куска проволоки содинили последовательно, получили ri=2*r; два куска той же проволоки соединили параллельно, получили rii=r/2; ну, а теперь раздели первое на второе!

а теперь общий случай: ri=r*n; rii=r/n; ri/rii=n^2; кусок проволоки разрезали на n одинаковых кусков. сначала эти куски соединяют последовательно: ri=r*n; затем соединяют параллельно rii=r/n; ну и дели первое на второе и делай выводы.

I think that a family is a very important thing for everybody. A family is the people that always love you, support you and help you. For me it is impossible to live without my family. My family is not large. I have got a mother, a father and a brother Dima. There are four of us in the family. We also have grandparents and a lot of relatives.

First of I’d like to say a few words about my parents. My mother is a good-looking woman with blond hair. She is forty-two but she looks much younger. She is a teacher of Russian. She works in a school. She likes her job very much. My mother keeps the house and takes care of my father and us. She is very good at cooking. She always cooks very delicious meals. Our mother is very kind, but sometimes he is strict to us. She always checks if our homework is done. Mother takes care of our free time, so that we are not able to waste our time.

My father is a lawyer. He is forty-five. He is a professional. My father does his work very well and gets good money. He is also handy with many things. He can fix almost everything. He also likes making models of planes. My parents have been married for 20 years already. They have much in common, but they have different views on music, books, and films. For example my father likes thrillers and my mother likes adventure films and fantasy. My father is fond of football and chess. My mother likes playing ping pong. My parents work a lot.

My younger brother, Dima, is a student of the same school. He wants to become a lawyer, like our father. Besides he is playing table tennis like our mother. He studies well. On the one hand, Dima loves constructing and can become an aircraft designer, on the other hand he is very good at languages and can become an interpreter. My grandmother and my grandfather are pensioners. They live not far from us. Sometimes our granny helps us to run the house. She is fond of knitting. My grandfather is a military man and he reads a lot! The library that we have at our flat is the tenth part of all the books that granddad has at his place.

As for me, I’d like to become a computer programmer. I have always loved computer science. I can make some computer programmes and I also can play the guitar very well. I like different kinds of music, but mostly I prefer rock.

We all get on with each other very well. Every one in our family is rather busy, but we are always very happy if we have a possibility to spend some time together. My family means a lot to me.