2017年6月英语四级阅读训练题100-文都四六级考试网

2017年6月英语四级阅读训练题100

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　　2017年6月英语四六级考试考试报名已经陆续开始，不知道各位考生有没有开始准备复习呢？文都四六级考试网小编会一直陪伴着大家一起复习的！英语四级考试中四级阅读所占比重为百分之三十五，阅读训练的重要性不言而喻，然而四级阅读技巧也是一门学问。想要更早的为2017年6月的四六级考试做准备，那就来看看四六级考试网小编为各位整理的英语四级阅读训练题~【2017英语四级报名时间】

　　Newspapers often tell us of floods in some parts of the United States.

　　Nearly every year on the great central drainages heavy rains and melting snow cause the waters to pour out the mountains and plains, to turn brooks into torrents, and to swell quiet streams into wild uncontrolled rivers. From Cairo to New Orleans, and from Pittsburgh to Paducah, the cry "River rising!" is a familiar yet fearful voice. . . When the rivers sometimes become too high or too swift to be controlled communities are flooded, families flee from their homes, croplands are washed out, and transportation comes to a halt. Hunger, disease, and death follow the wild waters.

　　Although given less publicity, the agricultural damage done by the many smaller, more frequent floods usually far exceeds the losses caused by the very grand ones. In the Central States, ditches and drains cause the flows from spring rains and melting snow to run far more rapidly than in the days before white men settled on the land. Once, excess spring flood waters emptied into lakes and swampy lands, there to be detained for slow release into stream and rivers. Now, systematic drainage has actually eliminated these natural reservoirs.

　　In the more rolling sections of the East, spring runoff was formerly absorbed and held temporarily in the porous soils beneath the unbroken expanse of forest. When large areas were converted to farm use, removal of the forest and the practice of up-and-down hill plowing deprived the soils of much of their ability to catch and store water.

　　The effects of eliminating the natural forest cover are shown in the gullied farm lands and widened stream channels found in some densely settled areas. Partly because the stream channels are more or less filled with material washed down from the uplands, and partly because storm runoff has increased, the channels are today no longer able to carry all the flow from heavy rains. This explains why the streams overtop banks far more often than in the days before settlement.

　　26. The best title for the selection would be______.

　　A. River Rising! River Rising! B. Forests and Floods

　　C. Flooding in the U. S. D. The Results of Flooding

　　27. All of the following cause floods EXCEPT______.

　　A. heavy rain B. melting snow

　　C. increasing storm runoff D. porous soil

　　28. The author states that______.

　　A. lakes and swamps once acted like natural reservoirs

　　B. up-and-down hill plowing catches and stores water

　　C. stream channels are the best carriers of water

　　D. floods are easily prevented and controlled

　　29. According to the selection, streams overtop their banks partly because______.