题目内容
阅下面的文章，并从所给选项中选出最恰当的句子完成每个段落，并将其字母标号填在相应的横线上（其中一个为多余选项）。
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The Mississippi
The Mississippi is a romantic river whose relationship with man goes back beyond its discovery by the Spaniards in the 16th century．Indians used the river as a highway and as a source of food．and it was they who gave it its name“misi-sipi”，meaning“river of many fishes”．European explorers called it the Mississippi．Today, it is often called“Old Man River”．
45 ．Flowing from north to south，it gathers many waters on its way．You will easily understand why it is called“Old Man River”，or the“Father of Waters”．A lot of early setters built their homes on the land along its waters．The Mississippi was and is the old man of all American people，too
46 ．In 1927 the Mississippi flooded 26 thousand acres，sweeping away farms，towns，everything in its path．In 1938 its floods drowned or killed 200 people and made millions homeless．Today the river has largely been controlled．
47 ．Pioneers who first reached its banks wondered not only where it went，but what lay beyond．In 1764 the French founded a city on the right bank of the river, and named it after their king，Louis XV．This city, named St Louis，became the jumping-off place for the adventurous men and women who opened up the Great Plains，and the way to the Far West．
48 ．One of the saddest memories may be that of the blacks who were carried down the river and sold as slaves．The river also remembers that their sobbing and crying voices once passed over its waters．
49 ．Today, the river is still an important part of the American economy．Goods are carried up and down the river to get to other parts of the country and the world．
CEABD
【解析】略
阅下面的文章，并从所给选项中选出最恰当的句子完成每个段落，并将其字母标号填在相应的横线上（其中一个为多余选项）。
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1938 its floods drowned or killed 200 people and made millions homeless．Today the river has largely been controlled．