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Did you know that you do not have to be a chemist to invent something? An example of chemistry invention that was made by a non-scientist is Liquid Paper. In 1952, a divorced woman named Bette Nesmith Graham needed to work to support herself and her son. Life was very difficult for a single mother. [1] She soon found a job as a typist, but she was not very good at it. [2] She made a lot of errors typing leading her to formulate a white tempura paint to hide them. [3] Using her kitchen as a laboratory, she developed a liquid that other people wanted to buy and use. She named this liquid “Mistake Out” [4]

While continuing to work as a secretary, she educated herself in business methods, promotion, and research until she was satisfied that the product she had developed was really worthwhile. Sometimes around 1952 she offered “Mistake Out” to IBM, which turned it down. From 1952 until 1979 she continued to make and sell “Mistake Out”, now renamed “Liquid Paper”, out of her home. In 1979, the Gillette Corporation bought “Liquid Paper” for $47.5 million dollars plus royalties.

Question 36: Which of the following is the best title for this passage?

A. The Life of Bette Nesmith Graham B. The Process of Manufacturing “Liquid Paper”

C. How an Ordinary Person Became an Inventor D. The Importance of Science Education

Question 37: The author probably started this passage with a question in order to____.

A. catch the reader‟s attention

B. raise an objection against a non-scientist‟s invention

C. express curiosity about the history of invention

D. none of the above

Question 38:The word „formulate’ in bold in the first paragraph is closest in meaning to____.

A. use B. think about C. make D. correct

Question 39: What did Graham do at the same time that she educated herself in business?

A. She made and sold “Liquid Paper” B. She worked as a consultant for IBM

C. She worked as a secretary D. She continued inventing new products.

Question 40: What can be inferred abut Graham?

A. She was uninterested in science B. She was very determined to succeed

C. She was not ambitious D. She was a scientific genius.

Question 41:The word ‘it’ in bold in the second paragraph refers to___.

A. IBM B. „Mistake Out‟ C. research D. none of above

Tìm x biết:

X^2-9=2(x+3)^2