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.

　　[注釋]scattered是scatter的過去分詞，也可作形容詞用，(=lying in different directions;not situated together,wide apart)分散的，散布在各處的。Separate分開的，spread傳播;攤開，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.

　　[注釋]two ways of looking at every questions意指“觀察每個問題的兩個方面”。

　　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.

　　[注釋]scarcely(=hardly,not quite,almost not)幾乎沒有。Scarcely是否定副詞，類似的有：hardly,barely,rarely,seldom,little等。研究生入學考試中經(jīng)常測試這類否定副詞的用法。

　　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.

　　[注釋]emission散發(fā)物，發(fā)射。exposure(to)暴露于：They believe that their health problems are the result of years of exposure to fine cotton dust.(他們認為，他們的健康問題是多年來暴露于棉花粉塵所致。)expansion膨脹，擴大;Heat causes the expansion of gas.本題譯文：正如汽車的生產(chǎn)和使用越來越多一樣，汽車的排氣管的散發(fā)物內(nèi)所含的有毒氣體量也在增加。

　　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.

　　[注釋]piece together拼合，拼湊;take off起飛;break away from脫離;pull out拔出;駛出;(車)減速。

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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.

　　[注釋]spoiled使......掃興: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.

　　[注釋]expression此處意指“表情”。Appearance表示人的“儀表，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.

　　[注釋]take advantage of(=make use of sth.for one's own benefit)利用：take advantage of my ignorance(利用我的無知)。

　　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.

　　[注釋]chance(偶然的)機會。Have與the(或a)possibility不能搭配;常用There is a possibility for sb.to do sth.表示客觀存在的“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.

　　[注釋]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.(科學家希望在與心臟病斗爭中很快取得重大突破。)

　　本題譯文：科學家認為他們在探索某些重要疾病的病因中已取得重大突破。