101. Professor Smith and Professor Brown will _____ in giving the class lectures.

　A. exchange　　 B. alter　　 C. shift　　 D. alternate

[答案]D. alternate.

[注释]alternate vt./vi. 轮流，交替发生或出现：Wet days alternate with fine days.(晴雨天交替更迭。)The weather today will alternate between fine and cloudy.(今天的天气将是晴间多云。)shift般动，移动(vt.)；转移到，迁移(vi.)；改变：1)Lend me a hand to shift the piano, will you?(请帮个忙搬一下这台钢琴。) 2)They have shifted away from this area.(他们已从这一地区迁走了。) 3)The candidate is constantly shifting his opinion about the problem.(这位竞选者在这个问题上不断改变他的观点。)exchange交换；exchange... for ... 用.......换......；alter(部分)修改。

100. In a typhoon, winds _____ a speed greater than 120 kilometers per hour.

A. assume B. accomplish C. attain　 D. assemble

[答案] C. attain.

[注释] attain (=succeed in doing or getting) 达到 (目的等) ,取得 (成就等) :I hope you will attain your object, accomplish (顺利) 完成。assume假定, 假设, 承担。assemble集合; 装配。

99. Despite all the evidence to the contrary, the witness _____ that his story was true.

A. stuck out　 B. stood out　 C. kept down　 D. held up

[答案] A. stuck out.

[注释]stick out 坚持。详见III.400.注释.

98. There were no tickets _____ for Friday's performance.

A. preferable　 B. possible　 C. considerable D. available

[答案] D. available.

[注释] available (=capable of being used; that may be obtained) 可利用的; 可以找到的：1) These tickets are available for one month. (这些票的有效期一个月。) 2) Is there a doctor available? (有否可以找到大夫？) 3) A limited number of seats are still available. (仍然还有少量座位。)

97. The rocks are very big with _____ of colors on them.

　 A. bands　　 B. marks　　 C. rails　　 D. shapes

[答案] A. bands.

[注释] band (颜色与其余部分不同的) 条纹。Mark痕迹, 斑点; 记号, 标记。本题是讲岩石上色彩不同的“条纹”, 故用bands. rail (轨道) ,shape (形状) ,均不合题意。

96. The continuous rain was _____ for the exceptional poor harvest

　 A. blamed　　 B. condemned　　 C. accused　　 D. charged

[答案] A. blamed.

[注释] blame sb./sth. for ... 因.......埋怨、责怪 .......：He blames you for neglect of duty. (他责怪你玩忽职守。) condemn 谴责、判刑。Accuse sb. of控告某人犯有.......。charge sb. with控告某人犯有......。

95. The shop-assistant was straight with his customers. If an article was of _____ quality, he'd tell them so.

　 A. minor　　 B. humble　　 C. inferior　　 D. awkward

[答案] C. inferior

[注释] inferior详见III.400.注释.

本题译文：这位商店售货员对顾客很坦率。如果货物质量不好, 他就把情况告诉顾客。

94. What you have done is _____ the doctor's orders.

　 A. attached to　　　　 B. resistant to

　 C. responsible to　　 D. contrary to

[答案] D. contrary to.

[注释] (be) contrary to与.......相反, 违反 (作表语) :What you wish to do is contrary to the regulations. contrary to也可以作状语：a. If you act contrary to the doctor's advice, you won't get well again. b. Contrary to what I thought, he has proved to be successful. 2) 作定语：The boy was swimming in a direction contrary to the current. (这男孩朝着逆流方向游去。)

93. The police refused to _____ the clues they were working on.

A. exhibit　　 B. disclose　　 C. expose　　 D. discern

[答案] B. disclose.

[注释]disclose (=uncover; allow to be seen; make known) 透露, 使显露： 1) The lawyer disclosed the details of the case. 2) He disclosed that he had made arrangements to buy a new car. exhibit 展览, 展出, 显示, expose 暴露,discern 认出, 发现, 辨别,识别。

本题译文：警方拒绝透露他们正在调查的线索。

92. Driving a car without insurance can have _____ consequences.

A. uncertain B. disastrous　 C. potential　 D. unworthy

[答案] B. disastrous.

[注释] disastrous 灾难性的。