Get ready to speak about a useful invention. Mention:
•When it was made and by whom
•What it is like and for what purpose it is used
•Why you believe it to be useful

Electricity, perhaps, is even more important. We wouldn’t be able to use computers and TVs without it. The invention of electricity dates back to the 19th century and is connected with such renowned names as Michael Faraday, Alessandro Volta, Humphry Davy and Andre Marie Ampere.