Vydáno dne 04.11.2006
Cvičný test cambridgeské zkoušky FCE zaměřený na gramatiku a slovní zásobu, část 2. Do textu o potápění doplníte 15 chybějících slov (dle vlastního uvážení).
People have been diving without mechanical aids since ancient times. In those days, divers mainly went underwater to search ___________________________(1) pearls or sponges.Various ways of supplying divers with air, and so permitting them to stay underwater for long periods of time, have been tried for well ___________________________(2) two thousand years.Alexander the Great ___________________________(3) said to have gone underwaterin an early ___________________________(4) of diving machine,and Aristotle talked about apparatus ___________________________(5) permitted divers to breathe underwater.
It was not ___________________________(6) the beginning of the 18th century that more advanced equipment was developed.In 1717, the first practical diving machine, or ‘diving bell’ ___________________________(7) it was called, was invented.This was a small wooden room with an open bottom, glass windows at the top to ___________________________(8) in light, and a supply of air coming through leather tubes.Something similar, made of steel, is ___________________________(9) use todayfor underwater work, ___________________________(10) as building the foundations of bridges.
However, ___________________________(11) divers want to move freely underwater, they require a suit.Early suits were made up ___________________________(12) a leather jacket with a metal helmet over the head into which air was pumped down from the surface through tubes.Divers gained even ___________________________(13) freedom of movementwhen they could ___________________________(14) rid of these tubesand carry ___________________________(15) own air with them in cylinders.