1.Drug abusing may have some side effects on one's health; however, it is not always ________ if he stops it timely.

　　A.permanent B.temporary

　　C.avoidable D.beneficial

　　[解析]permanent 永久的。句意：濫用毒品對(duì)健康有副作用;然而，如果及時(shí)停止副作用并非總是長(zhǎng)久的。temporary 暫時(shí)的;avoidable 可避免的;beneficial 有益的。

　　[答案]A

　　2.—Credit cards are ________ useful when travelling.

　　—True. They save us the trouble of taking too much cash.

　　A.finally B.nearly

　　C.hardly D.particularly

　　[解析]particularly 尤其，特別地。句意：信用卡在旅行時(shí)尤其有用。

　　[答案]D

　　3.When we put the suggestion to him, he thought highly of it and was ________ about its immediate application.

　　A.curious B.content

　　C.cautious D.enthusiastic

　　[解析]be enthusiastic about 對(duì)……熱心。curious 好奇的;content 滿(mǎn)足的;cautious 謹(jǐn)慎的。

　　[答案]D

　　4.The captain ordered his men to save only essential supplies before the ship sank, ________ the food, cooking equipment, candles, bedding and clothes.

　　A.specially B.exactly

　　C.particularly D.entirely

　　[解析]句意：船長(zhǎng)命令手下人搶在船下沉前只去拯救必需品，尤其是食物，炊具，蠟燭，寢具和衣物。particularly 意為 特別地;specially 特殊地;exactly 的確，確切地;entirely 完全地。

　　[答案]C

　　5. Glasses are ________ and must be handled with great care.

　　A. heavy B. smooth

　　C. flexible D. fragile

　　[解析]句意：玻璃是易碎品，要輕拿輕放。heavy 重的;smooth 熟練的;flexible 靈活的，可彎曲的;fragile 易碎的。由句意可知D項(xiàng)正確。

　　[答案]D

　　6.The students in the international school are encouraged to voice whatever opinions they have and question authority, which helps to develop their______ thinking.

　　A.cautious B.casual

　　C.careful D.critical

　　[解析]critical 批判的。cautious 謹(jǐn)慎的;casual 隨便的;careful 小心的。

　　[答案]D

　　7.What was considered impolite years ago has become ________ now.

　　A. accessible B. adjustable

　　C. unbelievable D. acceptable

　　[解析]句意：多年前認(rèn)為不禮貌的事情現(xiàn)在已經(jīng)可以接受了。accessible 可進(jìn)入的，可接近的;adjustable 可調(diào)整的;unbelievable 不可思議的;acceptable 可接受的。由句意可知D項(xiàng)正確。

　　[答案]D

　　8.—What do you think of the concert?

　　—There was nothing special; it was only ________.

　　A. average B. usual

　　C. normal D. common

　　[解析]句意：—你認(rèn)為演唱會(huì)怎么樣?—沒(méi)什么特別之處，一般。average (智力、表現(xiàn)等)一般的;平均的;usual 通常的;normal 正常的;common 常見(jiàn)的，普通的，共有的。由句意可知A項(xiàng)正確。

　　[答案]A

　　9.Actually, there are lots of jobs ________ in the western part of China.

　　A. available B. accessible

　　C. adorable D. admirable

　　[解析]句意：事實(shí)上，中國(guó)西部有許多工作機(jī)會(huì)。available 可獲得的，可得到的;accessible 可進(jìn)入的，可到達(dá)的;adorable 值得愛(ài)慕的，可愛(ài)的;admirable 令人敬佩的;極其出色的。由句意可知A項(xiàng)正確。

　　[答案]A

　　10.Your letter will get ________ attention! They know you're expecting the answer.

　　A. careful B. common

　　C. instant D. general

　　[解析]句意：你的來(lái)信會(huì)馬上得到關(guān)注!他們知道你在盼著回復(fù)。careful 小心的，認(rèn)真的;common 常見(jiàn)的，共有的;instant 立刻的，馬上的;general 大體的，一般的。由句意可知C項(xiàng)正確。

　　[答案]C

　　11.When the weather is fine, watching TV all day is not a ________ way to spend your time.

　　A. worth B. sensitive

　　C. worthwhile D. convenient

　　[解析]worth 值得的，只作表語(yǔ);sensitive 敏感的，過(guò)敏的;worthwhile 值得的，作定語(yǔ)或表語(yǔ);convenient 方便的。由句意和句中所缺成分可以知道C項(xiàng)正確。

　　[答案]C

　　12. Just like fingerprints, each person's DNA is ________ unless he has a twin.

　　A. unusual B. normal

　　C. various D. unique

　　[解析]句意：就像指紋一樣，除非有孿生兄弟姐妹，要不然一個(gè)人的DNA也是獨(dú)一無(wú)二的。unusual 不同尋常的;normal 正常的;various 各種各樣的;unique 獨(dú)特的，獨(dú)一無(wú)二的。由句意可知D項(xiàng)正確。

　　[答案]D

　　13.His knowledge of French was ________ for the job, although he was not fluent in the language.

　　A. adequate B. abstract

　　C. available D. appropriate

　　[解析]句意：他的法語(yǔ)知識(shí)對(duì)這份工作來(lái)說(shuō)足夠了，雖然他法語(yǔ)講得不流利。adequate 足夠的，可勝任的;abstract 抽象的;available 可達(dá)到的，可獲得的;appropriate 合適的，恰當(dāng)?shù)�。由句意可知A項(xiàng)正確。

　　[答案]A

　　14. The problem is how ________ the drug abuse remains in America.

　　A. regular B. practical

　　C. severe D. obvious

　　[解析]句意：?jiǎn)栴}是在美國(guó)濫用毒品是多么嚴(yán)重。regular 慣常的，有規(guī)律的;practical 實(shí)用的;severe 嚴(yán)重的;obvious 明顯的。由句意可知C項(xiàng)正確。

　　[答案]C

　　15. Many students find ________ jobs during their summer holidays to obtain some working experience.

　　A. permanent B. comfortable

　　C. temporary D. stable

　　[解析]句意：許多學(xué)生在暑假期間找臨時(shí)工作以獲得一些工作經(jīng)驗(yàn)。permanent 永久的;comfortable 舒服的;temporary 臨時(shí)的，暫時(shí)的;stable 穩(wěn)固的。由句意知C項(xiàng)正確。

　　[答案]C

　　16. The zoo worker told the visitors that in the case of a highly ________ animal, performance training is easy and not so painstaking.

　　A. intelligent B. interactive

　　C. internal D. initial

　　[解析]句意：動(dòng)物園工作人員告訴游客，在碰到高智商動(dòng)物的情況時(shí)，訓(xùn)練表演很容易，不那么費(fèi)勁。intelligent 聰明的;interactive 相互作用的，相互影響的;internal 內(nèi)部的，里面的;initial 開(kāi)始的，最初的。由句意可知A項(xiàng)正確。

　　[答案]A

　　17.—What do you think of investing in today's stock market?

　　—There are many risks, but also many ________ gains.

　　A. potential B. confidential

　　C. influential D. preferential

　　[解析]句意：—你認(rèn)為投資現(xiàn)今的股票市場(chǎng)怎么樣?—有許多風(fēng)險(xiǎn)之處，但也有潛在的獲利機(jī)會(huì)。potential 潛在的;有潛能的;confidential 機(jī)密的;機(jī)要的;influential 易受影響的;preferential 優(yōu)先的，優(yōu)待的，優(yōu)惠的。由句意可知A項(xiàng)正確。

　　[答案]A

　　18.________， the boys were shouting and singing.

　　A. Happy and excited B. Happily and excited

　　C. Happily and excitedly D. Happy and excitedly

　　[解析]句意：既高興又興奮，男孩子們又喊又唱的。分析結(jié)構(gòu)可知，此處用形容詞作狀語(yǔ)，表示主語(yǔ) the boys 的狀態(tài)，故A項(xiàng)正確。

　　[答案]A

　　19.After climbing up the top of the mountains, the three of them sat there, ________.

　　A. hungry and tiredly B. hungrily and tiredly

　　C. hungry and tired D. hungrily and tired

　　[解析]句意：爬到山頂之后，他們?nèi)齻�(gè)坐在那，又累又餓。由語(yǔ)境可知，此處是形容詞作狀語(yǔ)，表示主語(yǔ) the three of them 所處的狀態(tài)，故C項(xiàng)正確。

　　[答案]C

　　20.After the long journey, the Smiths returned home, ________.

　　A. safely but tired B. safe but tired

　　C. safe and tiring D. safely and tiring

　　[解析]句意：長(zhǎng)途旅行過(guò)后，史密斯一家回來(lái)了，安全但很疲憊。由語(yǔ)境可知，此處應(yīng)用形容詞作狀語(yǔ)，表示主語(yǔ) the Smiths 的狀態(tài)，故選B項(xiàng)。C項(xiàng) tiring 不能修飾人。

　　[答案]B