题目

Imagine a road crossing without the three-way traffic signal. Cars, trucks, school buses, bicyclists and students walking to school would try to rush through the crossing ___61____the same time. Their safety would be in danger. Thanks to an African-American____62____(invent) named Garrett Augustus Morgan, we have three-position traffic signals that help make crossings much safer. Mr. Morgan was born in Kentucky in 1877. He only___63____(receive) six year’s education. As a teen he left his family’s farm in search of better opportunities.___64___(live) in Cincinnati, Ohio, he continued his studies in English grammar. Then he moved on to Cleveland___65____ he worked as a repairman for a clothing factory. He had a keen interest in solving problems___66___(meet) in everyday life. Later he patented(获得专利) several inventions. The three-way traffic signal was just one of his famous inventions. One day he felt very sad when he saw a traffic accident. ___67___(help) reduce traffic accidents and save people’s lives, he ___68___(immediate) began to work on the invention. Finally, it was ___69___ great success which saved lives then, and ___70___(he) still saving lives today. 答案：61．at     62．inventor        63．received            64．Living      65．where 66．met        67．To help     68．immediately     69．a           70．is

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