Many objects that people use each day started with a simple idea. These objects have often changed the way we
46 . Some help us to do a job more
47 . Others fill a need or solve a problem.
In 1858, Lipman had such an
48 . He took out a pencil, a piece of paper,
49 an eraser. Then he began to write. Sometimes he needed to
50 a word. Each time he had to search under his books and papers to 51 the eraser. “ I wish my eraser would stay in one
52 !” he said.
Then Lipman had his simple idea. He
53 a groove(凹槽) in one end of the pencil. He glued(粘牢) the eraser into the groove. Lipman had solved his problem. Later he thought that others might like to have such a pencil. So he sold his
54 .Some pencils with erasers were
55 . His design earned $ 100000.
| 小题1: | | A．study | B．live | C．sleep | D．walk |
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| 小题2: | | A．easily | B．correctly | C．carefully | D．normally |
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| 小题3: | | A．article | B．aim | C．idea | D．action |
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| 小题5: | | A．spell | B．read | C．write | D．change |
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| 小题7: | | A．place | B．desk | C．book | D．hand |
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| 小题8: | | A．marked | B．prepared | C．cut | D．invented |
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| 小题9: | | A．books | B．pencil | C．design | D．eraser |
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| 小题10: | | A．wonderful | B．expensive | C．colourful | D．common |
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