#1. Perfect Active. Open the brackets and put the verb into the right form. Translate the sentences.

Откройте скобки и переведите предложения. 1) Electricity (to replace) other sources of energy. 2) Why you (to tell) him about it? 3) Our electronics and radio electronics (to develop) from the country's only radio laboratory. 4) You ever (to be) to London? 5) He (to graduate) from our University by 2014.

#2. The Sequence of Tenses. Откройте скобки и переведите предложения. 1) It was announced that the cryogenic cable (to be invented) 2) The young scientist discovered that Newton (to make) in Russia. a mistake in his calculations. 3) Our professor informed us that he (to deliver) of materials next Thursday. the following lecture on strength 4) He was told that the lecturer (to be) in London recently. 5) My friend wanted to know if I (to study) English then.

#3. The Passive Voice. Откройте скобки и переведите предложения. 1) Some institutes of technology (to reorganize) 2) That problem (to discuss) at our meeting last week? into universities. 3) New methods of research (to use) 4) Many students (to enroll) in our laboratory nowadays. this year. 5) What questions (to discuss) next week?

Nicolaus Copernicus (/koʊˈpɜːrnɪkəs, kə-/;[2][3][4] Polish: Mikołaj Kopernik;[b] German: Nikolaus Kopernikus; Niklas Koppernigk; 19 February 1473 – 24 May 1543) was a Renaissance-era mathematician and astronomer who formulated a model of the universe that placed the Sun rather than the Earth at the center of the universe, in all likelihood independently of Aristarchus of Samos, who had formulated such a model some eighteen centuries earlier.[c][d]The publication of Copernicus' model in his book De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres), just before his death in 1543, was a major event in the history of science, triggering the Copernican Revolution and making a pioneering contribution to the Scientific Revolution.[6]

Copernicus was born and died in Royal Prussia, a region that had been part of the Kingdom of Poland since 1466. A polyglot and polymath, he obtained a doctorate in canon law and was also a mathematician, astronomer, physician, classics scholar, translator, governor, diplomat, and economist. In 1517 he derived a quantity theory of money – a key concept in economics – and in 1519 he formulated an economic principle that later came to be called Gresham's law.[e]
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Sir Isaac Newton is an English scientist and mathematician. He was born in 1642, on the 25th of December in the little village of Woolsthorpe in England. His father was a wealthy farmer but he had died before Isaac was born.

Newton published his discoveries in two books which contain his three laws of motion and the universal gravitation law. The scientist used these laws to predict the motion of the planets around the Sun, the stars and comets motion. Isaac Newton studied optics and developed the theory of colour: he discovered that a prism could decompose white light into a multicoloured spectrum. He was also the constructor of the first practical reflecting telescope in the world. As for mathematics he and Leibniz developed the fundamental theorem of infinitesimal calculus.

Moreover Isaac Newton devoted his time to studying theology and practicing alchemical experiments. It is known that he published some of his theological researches. He made an attempt to predict the end of the world and he estimated it would happen after the year of 2060.

Newton studied at Trinity College in Cambridge University. His incredible aptitude was recognized early. It was there that he discovered the generalized binomial theorem. Then he moved to London in 1969 where he lived until his death in 1727. The scientist was also a member of the Parliament of England. Newton died in his sleep at the age of 84 and was buried in Westminster Abbey. He was never married and died intestate.

Isaac Newton is considered to be the most influential scientist in the history of mankind. His discoveries on physics, astronomy and mathematics provided a basis for modern science and his ideas changed our world.

1 phoned ( законченное действие в действие началось в и продолжается до сих пор)

2 did you buy ( действие началось и закончилось в

3 has opened (завершенное действие с результатом в настоящем) -told (действие началось и закончилось в

4 wrote ( действие началось и закончилось в

5 have known ( действие началось в и всё еще продолжается ,результат важен в настоящем) - introduced ( действие началось и закончилось в

6 gave ( законченное действие в завершенное действие с результатом в настоящем)

7 did you see -phoned ( завершённое действие  в действие, которое началось в результат важен в настоящем)

8 have you been ( действие произошло в но результат в настоящем )- went,spent ( два действия в которые произошли друг за другом)

9 was ( законченное действие в действие в но важен результат)