Раскройте скобки, употребив глагол в нужной грамматической форме. 1. the process of getting alloys (become – present continuous) much quicker and much cheaper. 2. d.i. mendeleyev (to discover – past simple) the periodic law of elements, the table of elements (to be called – past simple) his name. 3. a new comfortable bus (to develop – passive voice, past simple) to transport people over long distances. 4. atomic ice-breakers (to operate – present simple) on a negligible quantity of atomic fuel. 5. we believe that cybernetics (to be – present simple) an important branch of modern technology.
2)discovered
3) was developed.
4) operates
5) is