1. they (to drink) tea when i (to come) home. 2. he (to walk) along the river when a boat (to pass). 3. the old man (to think) about his plan when he (to fall) asleep. 4. we (to listen) to an interesting lecture yesterday. 5. when i (to enter) the classroom, the teacher (to write) words on the blackboard and the pupils (to copy) them into their exercise-books. 6. they (to get) ready to
go out when it (to begin) raining. 7. yesterday at one o'clock i (to have) lunch at the canteen. 8. when he (to come) in, i (to do) my exercises. 9. what you (to do) at eight o'clock yesterday? 10. at this time yesterday i (to go) home. 11. you (to sleep) when i (to go) out. 12. he (to read) on the sofa when i (to come) in and (to sit) down beside him. 13. i (to walk) along the street
with my friend when a tram (to pass). 14. she (to look) out of the window when i (to see) her. 15. we (to answer) the teacher's questions when the headmistress (to enter) the classroom. можно

1. they    were  drinking  tea when i  came  home.

2. he  was  walking  along the river when a boat    was  passing

3. the old man  was thinking  about his plan when he  fell asleep.

4. we    listened to an interesting lecture yesterday.

5. when i    entered  the classroom, the teacher  was  writing  words on the blackboard and the pupils  were  copying  them into their exercise-books.

6. they    were getting  ready to go out when it    began  raining.

7. yesterday at one o'clock i    was  having  lunch at the canteen.

8. when he    came  in, i  was  doing  my exercises.

9. what  were  you      doing  at eight o'clock yesterday?

10. at this time yesterday i    was going  home.

11. you    were  sleeping  when i    went  out.

12. he    was reading  on the sofa when i  came  in and    sat  down beside him.

13. i    was walking  along the street with my friend when a tram    passed.

14. she  was looking  out of the window when i  saw  her.

15. we    were answering  the teacher's questions when the headmistress    entered  the classroom

Biography: yuri alexeivich gagarin the russian cosmonaut yuri alexeivich gagarin (1934-1968) was the first man to orbit the earth in an artificial satellite and thus ushered in the age of manned spaceflight. yuri gagarin the third child of alexei ivanovich, a carpenter on a collective farm, and anna timofeyevna, was born on march 9, 1934, in the village of klushino, smolensk province. yuri attended an elementary school in gzhatsk; in the sixth grade he began to study physics. at the age of 15 he became an apprentice foundryman in an agricultural machinery plant outside moscow and enrolled in an evening school. in 1951 gagarin transferred to the saratov industrial technical school. in 1955 he had to prepare a thesis in order to graduate. his problem was to design a foundry capable of producing 9,000 tons (metric) of castings a year. the state examining committee accepted his thesis, and he received his diploma. gagarin joined the saratov flying club in 1955 and won his wings, learning to fly in the yak-18. late that year he was drafted and sent to the famous orenburg flying school, since he already had a pilot's license. he was disconcerted to learn that he would not be immediately put into jet planes. after he became an aviation cadet on jan. 8, 1956, he was permitted to fly - but not in the jets he coveted. he started out all over again in the familiar yak-18, learning to fly it the air force way. that year he also began flight training in the mig jet. cosmonaut selection and training on oct. 4, 1957, sputnik 1, the world's first artificial satellite, was orbited by the soviet union. four days after sputnik 2, on nov. 7, 1957, gagarin graduated from the flying school and was commissioned a lieutenant in the soviet air force. on the same day he married valentina goryacheva. gagarin spent 2 years as a fighter pilot at an airfield above the arctic circle. by 1958 the soviet government was asking for volunteers from the air force to pilot its spacecraft. on oct. 5, 1959, gagarin made formal application for cosmonaut training; he was selected in the first group of pilots. in 1960 the original group of 50 had been whittled down to 12, and these men moved to zvezdograd (star city), a newly built holding and training area in a suburb of moscow. for gagarin and his 11 classmates training began in earnest. they were introduced to a bewildering curriculum of space navigation, rocket propulsion, physiology, astronomy, and upper atmospheric physics and were trained on special devices to accustom them to the physiological stresses of space flight. more to gagarin's liking were the long hours spent in the mock-up of the vostok, an exact replica of the spacecraft in which he would later orbit the earth. after only 9 months of training the cosmonauts were told that the first flight of the vostok would be on april 12, 1961. orbiting earth the selection of gagarin as the first man to orbit earth was assured when each cosmonaut was asked to designate who should be the one to make the flight; 60 percent named gagarin. he was launched in vostok 1 on the planned date, and during the crowded 1 hour 48 minutes of his single orbit of the earth he proved that man could survive in space and perform useful tasks. his mission ended at 10: 55 a.m., when he landed safely in a field near saratov. following his mission, gagarin became the commander of the cosmonaut detachment at zvezdograd, a position he held until april 1965, when he briefly reentered mission training as a backup cosmonaut. during this period he also enrolled in the zukovsky institute of aeronautical engineering, where he began a 5-year course leading to a degree. on march 27, 1968, gagarin died in a plane crash outside moscow while on a routine training flight. he was given a state funeral and was buried in the kremlin wall facing red square.