题型：语法填空（语篇） 题类：常考题 难易度：困难
宁夏大学附属中学2019届高三上学期英语第六次月考试卷
Imagine a road crossing without the three-day traffic signal, cars, trucks, school buses, bicyclists and students walking to school would try to rush through the crossing the same time. Their safety would be in danger.
Thanks to an African American (invent) named Garrett Augustus Morgan, we have three-way traffic signals that help make crossings much (safe). Mr. Morgan was born in Kentucky in 1877. He only received six years' education. As a teen he left his family's farm in search of better (opportunity). Living in Cincinnati, Ohio, he continued his studies in English grammar. Then he moved on to Clevelandhe worked as a repairman for a clothing factory. He had a keen interest in solving problems (meet) in everyday life. Later he patented several inventions. The three-way traffic signal was just one of . One day he felt very sad when he saw a traffic accident. To help reduce traffic accidents and save people's lives, he (immediate) began to work on the invention. Finally, it was great success which saved lives then, and (be) still saving lives today.
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