【題目】根據(jù)短文內(nèi)容，從短文后的選項(xiàng)中選出能填入空白處的最佳選項(xiàng)。選項(xiàng)中有兩項(xiàng)為多余選項(xiàng)。

Winter begins in the north on December 22nd.People and animals have been doing what they always do to prepare for the colder months, squirrels, for example, have been busy gathering nuts from trees. 【1】

They examined differences between red squirrels and gray squirrels in the American state of Indiana. The scientists wanted to know how these differences could affect the growth of black walnut(黑胡桃）trees. 【2】 The black walnut tree is also a central part of some hardwood forests.

Rob Swihart of Purdue University did the study with Jake Goheen, a former Purdue student nowat the University of New Mexico. The two researchers estimate that several times as many walnuts grow when gathered by gray squirrels as compared to red squirrels.Gray squirrels and red squirrels do not store nuts and seeds in the same way. Gray squirrels bury nuts one at a time in a number of places. 【3】 So some nuts remain in the ground. Conditions are right for them to develop and grow the following spring. Red squirrels, however, store large groups of nuts above ground.

【4】 But Professor Swihart says their numbers began to decrease as more forests were cut for agriculture. Red squirrels began to spread through the state during the past century. The researchers say red squirrels are native to forests that stay green all year, unlike walnut trees. They say the cleaning of forest land for agriculture has helped red squirrels invade（涌入）Indiana. 【5】

A. Gray squirrels are native to Indiana.

B. But they seldom remember where they buried every nut.

C. Red squirrels bury nuts in a different way.

D. The black walnut is the nut of choice for both kinds of squirrels.

E. Jake Goheen calls them a sign of an environmental problem more than a cause.

F. Scientists are worried that they will drive away the gray squirrels.

G. Well, scientists have been busy gathering information about what the squirrels do with the food they collect.

【答案】

【1】G

【2】D

【3】B

【4】A

【5】E

【解析】

試題分析：本文講述了一項(xiàng)科學(xué)研究，每年的12月22日北方進(jìn)入冬季后，人們和動(dòng)物們會(huì)做什么來(lái)渡過(guò)寒冷的動(dòng)機(jī)呢？松鼠們開(kāi)始行動(dòng)了，人們也對(duì)他們進(jìn)行了研究，紅、灰松鼠都會(huì)收集黑胡桃,而它們的行為會(huì)帶來(lái)什么影響呢？本文作者就此做了研究。

【1】G考查對(duì)上下文的理解與判斷能力。在上文“for example, have been busy gathering nuts from trees.”提到松鼠忙于收集堅(jiān)果，下文提出對(duì)比，即可選出答案G.

【2】D考查對(duì)上下文的理解與判斷能力。根據(jù)上文“The scientists wanted to know how these differences could affect the growth of black walnut(黑胡桃）trees”以及下文出現(xiàn)的“also”一詞，即可知道兩種松鼠都愛(ài)黑胡椒，故選D。

【3】B考查對(duì)上下文的理解與判斷能力。根據(jù)上下文同時(shí)理解，后文“remain in the ground”是關(guān)鍵，可知他們不知道放在哪里，故選B。

【4】A考查對(duì)上下文的理解與判斷能力。根據(jù)后文中的 “but”轉(zhuǎn)折，即可推斷出前文是消極含義，故選A。

【5】E考查對(duì)上下文的理解與判斷能力。本文最后一個(gè)選項(xiàng)作為文章收尾有總結(jié)含義。作者是一項(xiàng)研究，經(jīng)過(guò)前文論證后則得出結(jié)論，故選E。

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