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：滥用毒品对健康有副作用;然而，如果及时停止副作用并非总是长久的。temporary 暂时的;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，特别地。句意：信用卡在旅行时尤其有用。

　　[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 对……热心。curious 好奇的;content 满足的;cautious 谨慎的。

　　[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：船长命令手下人抢在船下沉前只去拯救必需品，尤其是食物，炊具，蜡烛，寝具和衣物。particularly 意为 特别地;specially 特殊地;exactly 的确，确切地;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，要轻拿轻放。heavy 重的;smooth 熟练的;flexible 灵活的，可弯曲的;fragile 易碎的。由句意可知D项正确。

　　[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 谨慎的;casual 随便的;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：多年前认为不礼貌的事情现在已经可以接受了。accessible 可进入的，可接近的;adjustable 可调整的;unbelievable 不可思议的;acceptable 可接受的。由句意可知D项正确。

　　[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：—你认为演唱会怎么样?—没什么特别之处，一般。average (智力、表现等)一般的;平均的;usual 通常的;normal 正常的;common 常见的，普通的，共有的。由句意可知A项正确。

　　[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：事实上，中国西部有许多工作机会。available 可获得的，可得到的;accessible 可进入的，可到达的;adorable 值得爱慕的，可爱的;admirable 令人敬佩的;极其出色的。由句意可知A项正确。

　　[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：你的来信会马上得到关注!他们知道你在盼着回复。careful 小心的，认真的;common 常见的，共有的;instant 立刻的，马上的;general 大体的，一般的。由句意可知C项正确。

　　[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，只作表语;sensitive 敏感的，过敏的;worthwhile 值得的，作定语或表语;convenient 方便的。由句意和句中所缺成分可以知道C项正确。

　　[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：就像指纹一样，除非有孪生兄弟姐妹，要不然一个人的DNA也是独一无二的。unusual 不同寻常的;normal 正常的;various 各种各样的;unique 独特的，独一无二的。由句意可知D项正确。

　　[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：他的法语知识对这份工作来说足够了，虽然他法语讲得不流利。adequate 足够的，可胜任的;abstract 抽象的;available 可达到的，可获得的;appropriate 合适的，恰当的。由句意可知A项正确。

　　[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：问题是在美国滥用毒品是多么严重。regular 惯常的，有规律的;practical 实用的;severe 严重的;obvious 明显的。由句意可知C项正确。

　　[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：许多学生在暑假期间找临时工作以获得一些工作经验。permanent 永久的;comfortable 舒服的;temporary 临时的，暂时的;stable 稳固的。由句意知C项正确。

　　[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：动物园工作人员告诉游客，在碰到高智商动物的情况时，训练表演很容易，不那么费劲。intelligent 聪明的;interactive 相互作用的，相互影响的;internal 内部的，里面的;initial 开始的，最初的。由句意可知A项正确。

　　[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：—你认为投资现今的股票市场怎么样?—有许多风险之处，但也有潜在的获利机会。potential 潜在的;有潜能的;confidential 机密的;机要的;influential 易受影响的;preferential 优先的，优待的，优惠的。由句意可知A项正确。

　　[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：既高兴又兴奋，男孩子们又喊又唱的。分析结构可知，此处用形容词作状语，表示主语 the boys 的状态，故A项正确。

　　[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：爬到山顶之后，他们三个坐在那，又累又饿。由语境可知，此处是形容词作状语，表示主语 the three of them 所处的状态，故C项正确。

　　[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：长途旅行过后，史密斯一家回来了，安全但很疲惫。由语境可知，此处应用形容词作状语，表示主语 the Smiths 的状态，故选B项。C项 tiring 不能修饰人。

　　[答案]B