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.
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.
Finished
visited
checked
asked
worked
cleaned
wanted
kissed
studied
played
traveled
advised
did
tried
needed
washed
Ex.2
1.Julia did not study Maths.
2.Did you play golf?
3.Did they listen to the radio?
4.I did not pay the bills.
5.Did Katherine advise me to be polite?
6.Did Emily help her son?
7.John did not clean the flat.
8.Did Patricia open the door?
9.Yolanda did not finish her homework.
10.Did I wait for the train?
Ex.3
1.saved
2.asked
3.needed
4.wanted
5.delivered
6.kissed
7.closed
Объяснение:
Past Simple - просто добавляешь "ed" к глаголам ( кроме исключений).А в негативной форме пишешь "Did not".