Вкакой форме стоит сказуемое в предложениях? ? 1)in factories and plants we are surrounded with electronically controlled machines and instruments, we are carried by airplanes, ships, trains and cars with built-in electronic devices, and satellites circle the globe. 2)to develop such a computer qualitatively new integrated circuits were required. 3)already, the optical equivalent of a transistor has been produced, and intensive research on optical-electronic computers is being carried out in a number of countries around the world.
2) were required. Past Simple Passive
3) has been produced Peresent Perfect Passive