Объяснение: Electronic circuits are integral parts of nearly all the technological advances being made in our lives today. Television, radio, phones and computers immediately come to mind, but electronics are also used in automobiles, kitchen appliances, medical equipment and industrial controls. At the heart of these devices are active components, or components of the circuit that electronically control electron flow, like semiconductors. However, these devices could not function without much simpler, passive components that predate semiconductors by many decades. Unlike active components, passive components, such as resistors, capacitors and inductors, can't control the electron flow with electronic signals.
2. Look!___(somebody has broken) that window.
3. You look tired.___(Have you been working) hard?
4."___(Have you/ever/worked) in a factory?" "No, never."
5."Liz is away on holiday." "Is she? Where___(has she/gone)?"
6. My brother is an actor.___(he has appeared) in several films.
7. "Sorry, I'm late." "That's alright.___(I have not been waiting) long."
8. "Is it raining?" "No,___(it has stopped)."
9.___(I have lost) my address book.___(Have you/seen) it?
10.___(I have been reading) the book you lent me, but___(Ihave not/finished) it yet. It's very interesting.
11.___(I have read) the book you lent me, so you can have it back now.