3- Do Nam’s friends always like his jokes ?
f) Alexander Graham Bell was born in 1847 in Edinburgh, Scotland. He moved to Canada and then to the USA in the 1870s. In
America, he worked with deaf-mutes at Boston University. Soon, Bell started experimenting with ways of transmitting speech over a
long distance.This led to the invention of the telephone.Thomas Watson was Bell's assistant. Bell and Watson introduced the telephone in
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