In 1858 H. L. Lipman had such an 2 He took out a pencil,a piece of paper, 3 an eraser. Then he began to write. Sometimes he needed to 4 a word. Each time he had to search under his books and papers to5 the eraser. I wish my eraser would stay in one 6 ! ” he said.
Then Lipman had his simple idea. He 7 a groove (凹槽) in one end of the pencil. He glued (粘結(jié)) the eraser into the groove. Lipman solved his problem. 8 he thought that others might like to have such a pencil. So he sold (賣(mài)) his pencils. Pencils 9 erasers became 10 .
His design earned (賺錢(qián)) him $ 100,000.
() 1. A. study B. live C. sleep D. walk
() 2. A. article B. art C. idea D. way
() 3. A. so B. and C. but D. as
() 4. A. spell B. read C. write D. change
() 5. A. look B. see C. watch D. find
() 6. A. place B. desk C book D. hand
() 7. A. found B. prepared C. cut D. fixed
() 8. A. Before B. Later C. After D. When
() 9. A. have B. with C. or D. and
() 10. A. wonderful B. expensive C. colourful D. popular
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