Witam. Czy mógłby ktoś sprawdzić czy poniższe pytania w stronie biernej są poprawne ? Z góry dziękuję :)
1.Has millions of people been saved by penicillin ?
2.Was many modern inventions made by plastics ?
3.Was the technology for refrigeration developed throughout the 19th century ?
4.Has nearly everything we do been affected in some way by the capabilities provided by computers ?
5.Are submarines powered by nuclear technology ?