Добрые ! подставки слова в нужную форму. 1.people usually invent things to make life easier.household appliances,such as the vacuum (revolutionize) 2.most inventions develop from earlier ideas.for example,albert anything,but made major scientific discoveries that led to countless inventions,such us nuclear energe, lasers and microchips(not invent) 3.sometimes a new invention is an improvement on an old one,such as the vacuum cleaner.but some accident(make) 4.teflon, the non-stick coating used on result of a mistake made by its inventor,scientist roy plunkett(be)