188. 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(diǎn)從懸崖上掉下來，但得以抓住不放直到得救。

187. 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(shí)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(huì)引起蔬菜短缺。

186. 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.

185. 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。

184. 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”。

183. 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(shí)，我沒有能去看。)

182. 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。

181. 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。

180. I remember her face but I cannot _____ where I met her.

A. recall　　 B. remind　　 C. remember　　 D. remark

[答案]A. recall.

[注釋]recall(=bring back to the mind)想起，回憶起：But I really cann't recall your name at his moment.

Remind sb. of ...使......想起：1)The photo reminds me of my late father.(這張照片使我想起已故的父親。) 2)The sight of the clock reminded me that I was late.Remind sb. to sth.提醒......做......；Please remind me to write the letter.

179. The climbers _____ their ambition by reaching the summit of the mountain.

A. obtained　 B. sustained　 C. maintained　 D. realized

[答案]D. realised.

[注釋]realise sth. by doing sth. else通過做......來實(shí)現(xiàn).......。