Clothing manufacturers still refused to use the fastener. But in 1918 an inventor showed the American army a flying suit he had invented. It happened to use the slide-fastener. The army put the suit through such tough tests that it disintegrated(分裂)---all except the fastener! A Navy officer happened to see the tests, and Judson’s unknown little company got an order for ten thousand fasteners. Later, Judson’s invention was used in the manufacture of rubber galoshes（橡胶套鞋） by a big company. They called the galoshes `Zippers´. This is how the slide-fastener got it s popular name.

　　60. What does the sentence “Whitcomb Judson’s slide-fastener was called an out-of-blue invention” in the first paragraph mean?

　　A. That it was blue in color.

　　B. That it was totally unexpected.

　　C. That it was excellent in quality.

　　D. That it was not practical.

　　61. How many years did it take for a really practical zipper to be invented?

　　A. 22

　　B. 18

　　C. 19

　　D. 13

　　62. What do we know about Whitcomb Judson according to the passage?

　　A. It took Judson a lot of years to invent the first zippers.

　　B. Judson, together with Sundback invented a really practical fastener in 1913.

　　C. Judson invented a lot of things, not only including zippers but also a street railway system and motorcars.

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