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.

[注释]on purpose是介词习语,意为“故意地”。如用intention,则应说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.

[注释]at random(=without aim or purpose)随便地,胡乱地:
His clothes were scattered about the room at random.

By accident意外地;on occasion偶尔;on an average平均计算。

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.

[注释]miss doing sth.没有做某事:
I missed seeing the film when it was shown at school.(学校放映那部电影时,我没有能去看。)

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.

[注释]model此句中意为“(飞机的)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.

[注释]moderate(=make or become less violent or extreme)节制,缓和,减轻。

6. Don't _____ the news to the public until we give you the go-ahead (许可,准许).
A. release B. discard C. relieve D. retain

[答案]A, release.

[注释]release(=allow news to be published)发布(新闻):
Details of the scheme have not yet been released to the public.(这项计划的细节尚未向公众发布。)

relieve
1)减轻(痛苦,紧张情绪等):
What will relieve a headache? This will help to relieve our hardship.
2)使放心,使宽慰:
The good news relieved us, for we had been very anxious.
3)赈济,救济:
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,继续保有:
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.

[注释]scarcity(=the state of being scarce)缺乏;不足(指原本充足之物暂时在数量上的缺乏)。例如:
The scarcity of fruit was caused by the drought.(水果的供应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.(雪在赤道周围是罕见之物。)

invalidity(=making weak by illness; not suitable for use)无效性,丧失工作能力。

Variety(=difference of condition or quality)变化,多样化。
本题译文:目前席卷这一地区的暴风雨今后肯定会引起蔬菜短缺。

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.

[注释]hang on(=hold fast, keep hold)牢牢抓住,抓紧不放:
Help! I can't hang on much longer.(救命啊!我支持不住啦。)

keep on(doing sth.)继续(做......);

catch on 理解;

count on 指望,依赖。
本题译文:杰克差点从悬崖上掉下来,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.

[注释]preserve, stay, maintain, reserve这4个词均有“保持”,“维持”之意。

stay后可接形容词作表语:The weather stayed wet for three days.其他3个词均为及物动词。

Preserve(=keep safe from decay, risk, harm, danger, going bad etc.)保存,保护:
1)Policemen preserve order in the streets.(警察在街上维持秩序。)
2)We must preserve our natural resources.(我们必须保护自然资源。)
3)You paint woodwork to preserve it.(你油漆木制品以防腐烂。)

Maintain(=keep up)保持,维持,维修。

Reserve(=keep for a special purpose; store)保留,预定:
1)I'll reserve my opinion at his time,(这时我将保留我的看法。)
2)I'll phone up today and reserve a room.(我今天将打电话预定一个房间。)
本题译文:专家们说,步行是一个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.

[注释]tolerable(=fairly good, not too bad)可忍受的:
The pain has become tolerable.

manageable可处理的;可管理的;controllable可控制的;perceivable可觉察的。
本题译文:料想到的嗓音通常情况下比起等量的意外嗓音来说是可以忍受的。