Sadly, the abundance of passenger pigeons may have been their undoing. Where the birds were most abundant, people believed there was an ever lasting supply and killed them by the thousands. Commercial hunters attracted them to small clearings with grain, wait until pigeons had settled to feed, then threw large nets over them, taking hundreds at a time. The birds were shipped to large cities and sold in restaurants.
By the closing decades of the 19th century, the hardwood forests where passenger pigeons nested had been damaged by Americans' need for wood, which scattered(驱散)the flocks and forced the birds to go farther north, pring storms contributed to their decline. Soon the great flocks were gone, never to be seen again.
In 1897, the state of Michigan passed a law prohibiting the killing of passenger pigeons, but by then, no sizable flocks had been seen in the state for 10 years. The last confirmed wild pigeon in the United States was shot by a boy in Pike County, Ohio, in 1900. For a time, a few birds survived under human care. The last of them, known affectionately as Martha, died at the Cincinnati Zoological Garden on September 1,1914.
本文是一篇记叙文。叙述了旅鸽逐渐消失的过程。________.ere the largest bird population in the U.S.答案 D解析 根据Passenger pigeons(旅鸽) once flew over much of the United States in unbelievable numbers. Written accounts from the 18th and 19th centuries described flocks(群)so large that they darkened the sky for hours.可知选D。________.答案 B解析 根据Where the birds were most abundant, 可知选B。e money.
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