阅读下列短文，按照每题后的单词要求数量回答问题．
Harland Sanders was born in the USA in 1890， but his childhood was not a happy one． His father died when he was only six， so his mother needed to find a job． She went to Shirt factory and Harland stayed at home to look after his younger brother． That was when he first learned to cook．
He left home when he was twelve and worked on a nearby farm． After that he had a lot of different jobs and in 1930he became a service station manager in Corbin， Kentucky． He started cooking meals for hungry travelers who stopped at the service station， and soon people came only for the food． Harland moved to a 142﹣seat restaurant across the street where he could serve all his customers． Over the next nine years， he developed the secret chicken recipe（ 配方） that made him famous．
In the early 1950s， he closed the restaurant and decided to sell his recipe to other businesses． The first official（正式的） Kentucky fried chicken （ KFC） restaurant did not open until 1952． By 1964 ， there were more than 600KFCs in North America． That year Sanders sold the company （公司） for 2million dollars， but he continued to work as KFC' s public spokesman and visited restaurants all over the world． He travelled 250 ，000miles every year until died in 1980aged 90． Six years later， PepsiCo bought KFC for 480million dollars．
There are now KFC restaurants in more than 80countries and they sell 2． 5billion chicken dinners every year and the recipe is still a secret．
71． What did Harland Sanders have to do when he was 6？ （within 9words）
72． How long did it take him to develop his secret chicken recipe？ （within 5words）
73． When did the first official KFC restaurant open？ （within 2words）
74． What did Harland Sanders do after he sold the KFC business？ （within 8words）
75． How is Harland Sanders' chicken recipe now？ （ within 7words）
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