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It is clear from the passage that, once Edison had invented the electric lamp, ----.
Thomas Edison began conducting experiments
during his childhood. To start with, there were
hundreds of unsuccessful experiments but Edison
eventually invented and patented 2,500 items,
including the electric lamp and phonograph. He was
determined to “give laughter and light” to people, but,
until he actually managed to do so, most people
ridiculed him. Without losing hope, Edison attempted
over 1,000 unsuccessful experiments in his efforts to
make an electric lamp. When people told him he was
wasting his time, energy, and money for nothing,
Edison exclaimed, “For nothing! Every time I make an
experiment, I get new results. Failures are stepping
stones to success.” Determined to give people
electric lamps, Edison said he'd meet his goal by
early 1880. In October, 1879, he created his first
electric lamp, and in so doing, received much praise.
People realized that Edison's invention was not
affected by rain or wind, remaining constant through
bad weather. Just as he had hoped, Edison provided
people with light and laughter.