10. Great as Newton was, many of his ideas ?____? today andare being modified by the work of scientists of our time.?
A. are to challenge
B. may be challenged?
C. have been challenged
D. are challenging?
11. It is necessary that the students ?____? more excercises todo.?
A. have
B.must have
C. will have
D. can have?
12. The present situation forced us to ?____? this policy.?
A. adapt
B. admit
C. adopt
D. adjust?
13. We can ?____? the two islands with a bridge.?
A. unite
B. connect
C. relate
D. combine?
14. Due to the bad weather the plane was ?____? for two hours.?
A. delayed
B. canceled
C.postponed
D. dismissed?
15. The ?____? populated area was a breeding place forinfectious diseases.?
A. densely
B. sparcely
C. improperly
D. poisonous?
16. Perhaps the customer has ?____? his monthly statement and not paid the bill.?
A. omitted
B. bewildered
C. overlooked
D. escaped?
17. He was almost asleep, ?____? with all this hard work.?
A. worn down
B. worn out?
C. worn off
D. worn away?
18. It happened in front of a fruit and vegetable ?____?in myneighborhood.?
A. station
B. stand
C. joint
D. lift?
19. The first step in the study of any language is observing and?____? precisely what happens when native speakers speak it.?
A. setting off
B. setting about?
C. setting up
D. setting down?
20. As the pressure?____?, the liquid rock is forced up through channels in the resistant rock tothe earth’s surface.?
A. intensifies
B. magnifies?
C. heightens
D.deviates?
10. C)
【句意】尽管牛顿非常伟大，然而他的许多观点当前正受到怀疑，并且当今的许多科学家正在努力对这些观点进行修正。?
【难点】challenge意为“挑战，怀疑”，常用作及物动词。本句中牛顿的观点受到挑战为一个当前已经发生的事实，故采用现在完成时的被动语态。?
11. A)
【句意】学生们有必要做更多的练习。?
【难点】虚拟语气可以用于主语从句中，常用的句型为：It is(was) 形容词that…，主语从句中的谓语用(should) v.的表达形式。?
12. C)
【句意】目前的形势强迫我们采纳这项政策。?
【难点】adopt意为“采用，采取，采纳”;adapt意为“使…适应;改编”;admit意为“承认”;adjust意为“调整;使…适应”。
13. B)
【句意】我们可以用桥将两座岛屿联接起来。?
【难点】connect意为“连接;与…衔接”;unite意为“结合;团结”;relate意为“把…与…联系起来”;combine意为“结合;联合;化合”。?
14. A)
【句意】由于天气恶劣，飞机晚点两个小时。?
【难点】delay意为“使耽搁，延迟”;cancel意为“取消;终止”;dismiss意为“解雇，解散”;postpone意为“延期，拖延，缓办”，尤指因为某种原因事先作出安排，与delay不同。?
15. A)
【句意】人口稠密的地区是传染病滋生的地方。?
【难点】densely意为“稠密地;浓密地;密集地”;sparsely意为“稀地;稀疏地”;improperly意为“不合适地，不协调地”;poisonously意为“有毒地，引起中毒地”。?
16. C)
【句意】也许这位顾客忽略了他的月度报表，而没付单。?
【难点】overlook意为“忽略”;omit意为“遗漏;忘记”;bewilder意为“使迷惑;使糊涂;难住”;escape意为“逃过…的注意;被…忘掉”。?
17. B)
【句意】他干了这么多重活儿，累得精疲力竭，差不多睡着了。?
【难点】wear out意为“使疲乏;使厌倦;使耗尽”;wear down意为“使消瘦，使厌烦”;wear off意为“渐渐减少;消逝”;wear away意为“消磨，打发，虚度;(时光等)流逝”。?
18. B)
【句意】这件事发生在我们居民区一个水果蔬菜摊前。?
【难点】stand意为“摊位，摊子”;station意为“岗位”;joint意为“接合点，接合处”;lift意为“电梯”。?
19. D)
【句意】任何语言学习的第一步都是观察和精确记录本族人说话时所使用的语言。?
【难点】set down意为“写下，记录，记下”;set off意为“出发，动身”;set about意为“开始忙碌，着手工作”;set up意为“开办，建立，设立”。?
20. A)
【句意】随着压力的增强，岩浆通过坚岩里的一些渠道被挤压到地球表面。?
【难点】intensify意为“强化，增强”;magnify意为“放大，扩大”;heighten意为“增高，提高”，指高度;deviate意为“越轨，脱离”，常与from连用。?
