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是介詞習語，意為“故意地”。如用intention,則應說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.(這項計劃的細節(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，救濟：
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?。∥抑С植蛔±?。)

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：
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。