Read, fill in the blanks with appropriate relative pronouns, and then listen and check
This is the story of a very simple invention that you can find in almost every office in the whole world today. It is also the story of an inventor whose creativity and persistence resulted in a very useful product. What is the famous invention? It is Liquid Paper, the white liquid that covers up the mistakes you make when writing or typing. It was invented by Bette Nesmith Graham, a secretary in Dallas, Texas, in the early 1950s, who began using tempera paint to cover up the typing errors in her work.
At the time, she was a twenty-seven-year-old single mother of one son, struggling to make ends meet and working as a secretary to the chairman of a big Dallas bank. When she began to work with her first electric typewriter, she found that the type marks she typed onto the paper didn't erase as cleanly as those from manual typewriters. So Ms. Nesmith, who was also an artist, quietly began painting out her mistakes. Soon she was supplying bottles of her homemade preparation, which she called Mistake Out, to other secretaries in the building.
When she lost her job with the company, she turned to working full time to develop the Mistake Out as a business, expanding from her house into a small trailer she had bought for the backyard. In hopes of marketing her product, she approached IBM, which turned her down. She stepped up her own marketing and within a decade was a financial success. The product, which came to be called Liquid Paper, was manufactured in four countries and sold in nearly three dozen. In fiscal 1979, which ended about six months before she sold the company, it had sales of $38 million, of which $3.5 million was net income. By the time she finally sold her business to Gillette in 1979, she had built her simple, practical idea into a $47.5 million business.
It is heart-warming that the story has a happy ending in more ways than one. Ms. Nesmith...