Сделать предложения отрицательными. 1) mrs martin had had breakfast by ten. 2) kevin's brother had broken his bicycle. 3) fred had learnt the poem by heart. 4) we had finished everything be six. 5) martin had been to london.

1) Mrs Martin hadn`t had breakfast by ten.
2) Kevin's brother hadn`t broken his bicycle. 
3) Fred hadn`t learnt the poem by heart. 
4) We hadn`t finished everything be six. 
5) Martin hadn`t been to London.

Archimedes. Why in the first place was the ancient Greek scientist? First of all, because he is one of the greatest mathematicians of all times, close he came to the calculation of the number of "PI". Today all students and students of the daily study and enjoy the discoveries of the Greek. Also Archimedes was famous for the invention of many useful machines. Among these are the siege guns, and mirrors, поджигающие sails on the Roman ships by focusing sunlight. Archimedes made the first theorist of mechanics. For example, he presented the complete theory of the lever, applying it in practice. Also, scientists have developed a Archimedes screw (screw), with the help of which вычерпывается water and the present day. The primacy of the inventor of merit - all of it was opened more than two thousand years ago, when there were no computers, no technology available today, the inventors. Archimedes, perhaps, he studied in the libraries of Alexandria, but most of his knowledge was acquired independently.

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.