concentrate v.全神贯注，精神集中，专心致志;集中，集合;浓缩
We should concentrate all our efforts on improving education.我们应该集中精力努力改进教育工作。
Troops are concentrating south of the river.军队正向河的南边集结。
n.浓缩液
【用法】concentrate(sth.)on sth./doing sth.
【全真考题】Anne couldn't concentrate what she was doing while her family were watching TV.(93.1)
A.to B.on C.for D.in
【答案】B
continual adj.继续不断的;一再重复的
continual rain 不停的雨
【辨析】continual与continuous
continual一般指多次重复的动作：Please stop your continual questions.
continuous表示动作或物体继续不停地或不间断地进行下去：a continuous flow of traffic
【全真考题】Our journey was slow because the train stopped at different villages.(99.1)
A.unceasingly B.gradually
C.continuously D.continually
【答案】D
contrary adj.(在性质、倾向或方向等方面)相反的;好与人作对的
contrary beliefs 截然相反的信仰
He is an awkward，contrary child.他是个又麻烦又不听话的孩子。
n.反面
【用法】contrary to 违反：be contrary to the law;on the contrary 与此相反：It doesn't seem ugly to me;on the contrary，I think it's rather beautiful.
【全真考题】What you have done is the doctor's orders.(90.1)
A.attached to B.responsible to
C.resistant to D.contrary to
【答案】D
1.The issue is how to of radioactive waste.
A.deal B.dispose C.disposal D.do
[答案与译文]B.问题是怎样处理放射性废料。
[辨析及搭配]A.deal(with)处理;应付;做生意。例句：I have dealt with this company for more than a decade.我已经与这家公司做了十多年的生意。B. dispose(of)处理;处置;除掉;去掉。例句：Man proposes，God disposes.谋事在人，成事在天。Dispose of these old newspapers!把这些旧报纸处理掉。C.disposaln.处理;处置。D.do处理;整顿;解决(问题)。
2.The trend of brain drain does the developing countries degrees of harm.
A.diver B.diversify C.diverse D.diversity
[答案与译文]C.人才外流的趋势不同程度伤害着发展中国家。
[辨析及搭配]A.diver n.潜水员。B.diversify v.使多样化。C.diverse adj.不同的。D.diversity n.多样性。此处只能用形容词diverse修饰名词。
3.Whether he could obtain his diploma or not greatly him.
A.disturbed B.distinguished C.distresses D.disputes
[答案与译文]A.是否能取得文凭极大地扰乱了他的心绪。
[辨析及搭配]A.disturb 扰乱;打扰。B.distinguish(between;from)区分;辨别。C.distress使悲痛;使忧伤。D.dispute 争论;辩论;争执。
4.All had to stay in the open space，esp.at night， for the of the warning of an earthquake.
A.donation B.domination C.destination D.duration
[答案与译文]D.在整个地震警报期间，大家只好(特别是在夜间)待在空旷的地方。
[辨析及搭配]A.donation 捐赠品;捐款。B. domination统治;控制;支配。C.destination 目的地。D.duration期间;持续时间。
5.The free market is with purchasers and merchants.
A.deliberate B.dense C.dependent D.desirable
[答案与译文]B.自由市场上云集买卖双方而一片繁忙。
[辨析及搭配]A.deliberate蓄意的;审慎的。B. dense(with)密集的;浓厚的;繁忙的。C.dependent依靠的;依赖的;以……而定。D.desirable值得要的;合心意的;悦人心意的。
6.Mr.Smith is used to reading his favorite academic over coffee.
A.digital B.digest C.digestion D.indigestion
[答案与译文]B.史密斯先生习惯于边喝咖啡边读他最喜欢的学术文摘。
[辨析及搭配]首先排除A.digital adj.数字的;数码的。后面三个是同根词：B.digest v.消化，领悟。n.文摘，摘要。C.digestion n.消化，领悟。D.indigestionn.消化不良。
7.Failure is the mother of success，so that hers hasn't her，but encouraged her to redouble her exertions instead.
A.discharged B.discounted
C.discarded D.discouraged
[答案与译文]D.失败乃成功之母。所以她的失败没使她灰心丧气，反而使她加倍努力。
[辨析及搭配]A.discharge v.允许……离开;排(放)出。B.discount vt.打断;漠视;认为……不值得考虑。C.discard vt.&vi.抛弃;放弃。D.discouragev.使泄气;沮丧;阻拦。
From:https://www.zgghmh.com/CET-4/20002721.asp