1.He has left his book here on_____,so that you can read it.

　　A.purpose B.intention C.aim D.meaning

　　[答案]A.purpose.

　　[注釋]on purpose是介詞習(xí)語，意為"故意地"。如用intention,則應(yīng)說by intention故意地。

　　2.The magician picked several persons from the audience and asked them to help him with the performance.

　　A.by accident B.on occasion

　　C.at random D.on an average

　　[答案]C.at random.

　　[注釋]at random(=without aim or purpose)隨便地，胡亂地：His clothes were scattered about the room at random.

　　By accident意外地;on occasion偶爾;on an average平均計(jì)算。

　　3.The open university was started in order to help those who_____having a university education when they were young.

　　A.stopped B.failed C.missed D.ceased

　　[答案]C.missed.

　　[注釋]miss doing sth.沒有做某事：I missed seeing the film when it was shown at school.(學(xué)校放映那部電影時，我沒有能去看。)

　　4.His_____of the aeroplane was correct in every detail and could really fly.

　　A.shape B.pattern C.design D.model

　　[答案]D.model.[注釋]model此句中意為"(飛機(jī)的)模型"。

　　5.If you_____your demand,then maybe you will have more chance of getting what you want.

　　A.conduct B.dismiss C.grant D.moderate

　　[答案]D.moderate.

　　[注釋]moderate(=make or become less violent or extreme)節(jié)制，緩和，減輕。

　　6.Don't_____the news to the public until we give you the go-ahead(許可，準(zhǔn)許).

　　A.release B.discard C.relieve D.retain

　　[答案]A,release.

　　[注釋]release(=allow news to be published)發(fā)布(新聞)：Details of the scheme have not yet been released to the public.(這項(xiàng)計(jì)劃的細(xì)節(jié)尚未向公眾發(fā)布。)

　　relieve 1)減輕(痛苦，緊張情緒等)：What will relieve a headache?This will help to relieve our hardship.2)使放心，使寬慰：The good news relieved us,for we had been very anxious.3)賑濟(jì)，救濟(jì)：The fund is for relieving distress among the flood victims.4)relieve...from(of)解除，免除;a.This medicine will help to relieve you from your pain.b.He was relieved of his duties.

　　retain(=keep;continue to have or hold)保持，繼續(xù)保有：1)She retains a clear memory of her schooldays.2)You must retain your tickets.

　　7.The storm sweeping over this area now is sure to cause_____of vegetables in the coming days.

　　A.rarity B.scarcity C.invalidity D.variety

　　[答案]B.scarcity.

　　[注釋]scarcity(=the state of being scarce)缺乏;不足(指原本充足之物暫時在數(shù)量上的缺乏)。例如：The scarcity of fruit was caused by the drought.(水果的供應(yīng)不足是干旱所引起的。)rarity(=sth.uncommon,unusual or sth.valued because rare)珍稀，稀少：Snow is a rarity around the equator.(雪在赤道周圍是罕見之物。)invalidity(=making weak by illness;not suitable for use)無效性，喪失工作能力。Variety(=difference of condition or quality)變化，多樣化。

　　本題譯文：目前席卷這一地區(qū)的暴風(fēng)雨今后肯定會引起蔬菜短缺。

　　8.Jack almost fell off the cliff,but managed to_____until help came.

　　A.keep on B.catch on C.count on D.hang on

　　[答案]D.hang on.

　　[注釋]hang on(=hold fast,keep hold)牢牢抓住，抓緊不放：Help!I can't hang on much longer.(救命啊!我支持不住啦。)keep on(doing sth.)繼續(xù)(做......);catch on理解;count on指望，依賴。

　　本題譯文：杰克差點(diǎn)從懸崖上掉下來，但得以抓住不放直到得救。

　　9.Experts say walking is one of the best ways for a person to_____healthy.

　　A.preserve B.stay C.maintain D.reserve

　　[答案]B.stay.

　　[注釋]preserve,stay,maintain,reserve這4個詞均有"保持"，"維持"之意。stay后可接形容詞作表語：The weather stayed wet for three days.其他3個詞均為及物動詞。

　　Preserve(=keep safe from decay,risk,harm,danger,going bad etc.)保存，保護(hù)：1)Policemen preserve order in the streets.(警察在街上維持秩序。)2)We must preserve our natural resources.(我們必須保護(hù)自然資源。)3)You paint woodwork to preserve it.(你油漆木制品以防腐爛。)

　　Maintain(=keep up)保持，維持，維修。

　　Reserve(=keep for a special purpose;store)保留，預(yù)定：1)I'll reserve my opinion at his time,(這時我將保留我的看法。)2)I'll phone up today and reserve a room.(我今天將打電話預(yù)定一個房間。)

　　本題譯文：專家們說，步行是一個人保持健康的最好方法之一。

　　10.Expected noises are usually more_____than unexpected ones of the like magnitude.

　　A.manageable B.controllable

　　C.tolerable D.perceivable

　　[答案]C.tolerable.

　　[注釋]tolerable(=fairly good,not too bad)可忍受的：The pain has become tolerable.manageable可處理的;可管理的;controllable可控制的;perceivable可覺察的。

　　本題譯文：料想到的嗓音通常情況下比起等量的意外嗓音來說是可以忍受的。