Вставь past simple, past perfect, past progressive. last week we (to buy) a new car. while we (to buy) it, we (to see) our old friend. he (to be) glad to see us. we (to know) him before we (to see) him. while we (to talk), our children (to run), ( to jump) and (to break) on the ground. we (to be) upset.

Last week we bought a new car. while we were buying it, we   saw our old friend. he was glad to  see us. we had known him before we saw him. while we were talking, our children were running, jumping and breaking on the ground. we were upset.

Novosibirsk is situated on the great siberian river ob. its foundation is associated with the name of the well-known russian writer of the latter half of the 19th centuary n.garin-mikhailovsky. engineering was his second profession. in 1891—1893 garin-mikhailovsky built the left-bank tracks of the trans-siberian railway. that was the beginning of novosibirsk's history. the residents of novosibirsk called the railway square of the city by his name. novosibirsk region is situated in west siberia's southern part. thera are 14 towns in the region.today novosibirsk is a big industrial, scientific, cultural and educational centre. the city turns out machines, equipment. generators produced by the sibelectrotyazhmash plant are operating in cuba, poland, yugoslavia, syria. the sibelectroterm plant produces the most up-to-date electric steelsmelting furnaces, never heard of in europe. they have been exported in all to 20 countries of the world. other towns of novosibirsk region are growing rapidly. thus, berdsk has become a radio engineering centre producing high-fidelity radiosets. iskitim has become one of of russian centres producing cement and other building materials.novosibirsk is the first populated center east of the urals to have an underground railway of its own. there are many joint ventures in novosibirsk. novosibirsk has trade partners in many countries. novosibirsk is a scientific and cultural centre. akademgorodok, the township of the siberian branch of the russian academy of sciences is famous throughout the world. novosibirsk is called a city of three academies: the siberian branch of the vaskhnil, the siberian branch of the russian medical academy of sciences and the siberian branch of the russian academy of sciences.akademgorodok is situated on the coast of the man-made ob sea. more than twenty research institutes, the university are situated there. research work is being done on a very lardge scale there.residents of novosibirsk are proud of its state academic opera and ballet house, one of the worlds's biggest, its conservatoire of music, the operetta house and the puppet theater.the art gallery in novosibirsk is certainly the worth seeing! it contains works of ivan shishkin, vasily tropinin, nikolai rerickh, arkhip kuindzhi, ilya repin, vasily surikov, as well as contemporary artists. on the bank of the river kamenka stands the tall building of the state public scientific and technical library. it has more than five million volumes on its shelves.novosibirsk is an educational centre as well. every third resident of novosibirsk is a student who can make his choice of colleges. the city is still growing and becoming more beautiful with every passing day.