2. Transfer the sentences from Active into Passive. 1. I finished school 8 years ago.
2. I advanced the career.
3. My sister teaches students at the university.
4. I have already done my homework.
5. Scientists proved the theorem 20 years ago.
6. When will you defend your graduation project?
7. We carried out many experiments in the laboratory.
8. I took all the necessary textbooks in the library.
9. We will perform this work on the computer next week.
10. I write letters every week.

The White House is the official residence and principal workplace of the President of the United States, located at 1600 Pennsylvania AvenueNW in Washington, D.C. It has been the residence of every U.S. president sinceJohn Adams in 1800.

The house was designed by Irish-bornJames Hoban[2] and built between 1792 and 1800 of white-painted Aquia Creek sandstone in the Neoclassical style. When Thomas Jefferson moved into the house in 1801, he (with architectBenjamin Henry Latrobe) added lowcolonnades on each wing that concealed stables and storage.[3] In 1814, during the War of 1812, the mansion was set ablaze by the British Army in the Burning of Washington, destroying the interior and charring much of the exterior. Reconstruction began almost immediately, and President James Monroe moved into the partially reconstructed Executive Residence in October 1817. Construction continued with the addition of the semi-circular South portico in 1824 and the North portico in 1829.

Big Ben — is the most known sight of London. Big Ben is the name of the biggest bell on the hours located in northern part of the Westminster palace in London. It is part of an architectural complex of the Westminster palace. The official name — "An hour tower of the Westminster palace", also it call "St. Stephane's Tower". "Big Ben" — this building and hours together with a bell. The name of a tower arose from the name of a 13-ton bell established in it. Big Ben — is the most big quadrilateral clock with bells and the third on height an hour tower in the world. Hours became a symbol of the United Kingdom and London, the center of New Year's celebrations in the United Kingdom, the hour tower appeared in many movies