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。

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成果。)

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。