251.It is not profitable to provide bus services in districts where the population is widely_____.
A.scattered B.dismissed C.separated D.spread
[答案]A.scattered.
[注释]scattered是scatter的过去分词，也可作形容词用，（=lying in different directions;not situated together,wide apart）分散的，散布在各处的。Separate分开的，spread传播；摊开，dismiss解雇。

252.There are usually at least two_____of looking at every question.
A.ways B.directions C.views D.opinions
[答案]A.ways.
[注释]two ways of looking at every questions意指“观察每个问题的两个方面”。

253.He left in such a hurry that I_____had time to thank him.
A.almost B.even C.nearly D.scarcely
[答案]D.scarcely.
[注释]scarcely(=hardly,not quite,almost not)几乎没有。Scarcely是否定副词，类似的有：hardly,barely,rarely,seldom,little等。研究生入学考试中经常测试这类否定副词的用法。

254.As more and more cars are produced and used,so the_____from their exhaust-pipes contains an even larger volume of poisonous gas.
A.exposure B.distribution C.expansion D.emission
[答案]D.emission.
[注释]emission散发物，发射。exposure(to)暴露于：They believe that their health problems are the result of years of exposure to fine cotton dust.(他们认为，他们的健康问题是多年来暴露于棉花粉尘所致。)expansion膨胀，扩大；Heat causes the expansion of gas.本题译文：正如汽车的生产和使用越来越多一样，汽车的排气管的散发物内所含的有毒气体量也在增加。

255.The book seems to have been_____from various books and articles.
A.pieced together B.taken off
C.broken away D.pulled out
[答案]A.pieced together.
[注释]piece together拼合，拼凑；take off起飞；break away from脱离；pull out拔出；驶出；（车）减速。

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256.We had a marvelous holiday:only the last two days were slightly_____by the weather.
A.damaged B.hurt C.ruined D.spoiled
[答案]D.spoiled.
[注释]spoiled使......扫兴:A shower of rain spoiled our day's outing.

257.I could tell he was surprised from the_____on his face.
A.appearance B.view C.sight D.expression
[答案]D.expression.
[注释]expression此处意指“表情”。Appearance表示人的“仪表，外表”。

258.I'd like to take_____of this opportunity to thank you all for your cooperation.
A.profit B.benefit C.advantage D.interests
[答案]C.advantage.
[注释]take advantage of(=make use of sth.for one's own benefit)利用：take advantage of my ignorance(利用我的无知)。

259.If you ever have the_____to go abroad to work,you should take it.
A.possibility B.offer C.luck D.chance
[答案]D.chance.
[注释]chance(偶然的)机会。Have与the(或a)possibility不能搭配；常用There is a possibility for sb.to do sth.表示客观存在的“可能性”。

260.Scientists think they have_____in their attempt to find the causes of some major dieases.
A.broken through B.worked out
C.fallen out D.got round
[答案]A.broken through.
[注释]break through(=be successful after overcoming a difficulty)突破；取得重大成果：Scientists hope to break through soon in their fight against heart disease.(科学家希望在与心脏病斗争中很快取得重大突破。）
本题译文：科学家认为他们在探索某些重要疾病的病因中已取得重大突破。