Unit 1 Friendship using language课时作业

第一节（共15小题；每小题2分，满分30分）

　　阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。

A .

　　　　　　　　　　Study up on Afican American inventors

　　We celebrate Black History Month in February ,but you should be thanking these African American inventors year-round!Their innovative ideas helped change the world.

　　Thomas L. Jennings was one of the very first black inventors to get a patent in 1821. Jenings's creation- a dry-cleaning method - is just one of thousands dreamed up by Americans .Here are some cool creations.

　　Levis Latimer( 1848-1928) contributed to a better lightbulb in 1881 with an improved type of carbon filament(碳丝)。He worked with Thomas Edison.

　　George Crum( 1822-1914) cooked up potato chips in 1853.After hearing that his fries were too thick, he sliced up a potato thinly and fried it .The flat fries were a hit ,and chips were born.

　　George Washiongton Carver(1864-1943) mixed up more than 300 products from peanuts. He also found 75 uses for pecans(美洲山核桃).

　　 Elijah McCoy(1843-1929) was on the right track when he came up with his oil-dripping cup. The device kept engines oiled so trains don't need to stop to keep from overheating.

　　John Lee Love was a sharp guy. He invented a type of pencil sharpener so he didn't have to use a knife to perfect his pencil's point. He patented the device in 1897.

　　Charles Drew (1904-1950) came up with a great idea for saving lives.He figured out a way to preserve blood .His idea for blood banks has helped countless people.

　　Patricia Bath (1942-) created a device that made eye surgery(手术) safer and faster. The first African American female doctor to get a patent also started an eye institute in 1976.

　　You'd better not forget Madam C.J.Walker (1867-1919)! She dreamed up a product to regrow hair .The dream cream made her millions of dollars.

　　1.Who made a contribution public transportation?

A. Levis Latimer B. George Washiongton Carver