1．—Does he work hard at his lessons?
—Yes, he ________ no effort, as far as I know.
C．spares D．makes【解析】 选C 句意：“他学习努力吗？”“是的，据我所知，他不遗余力地学习。”固定短语spare no effort(to do sth.)“不遗余力(做某事)”。
2．Most restaurants and cafes have ________ small nosmoking areas but won't enforce the law.
A．set aside B．set out
C．set down D．set off【解析】选A 句意：大多数餐厅和咖啡馆没有执行法律而是留出了小的无烟区。set aside“留出”，符合句意。set out“动身”；set down“记下，登记”；set off“出发，动身”。
3．The situation in the country is ________， yet we are still concerned about its future.
A．coming up B．drying up
C．breaking up D．picking up
4．His confident words have ________ our doubts about how the plan will be carried out.
A．brought in B．taken up
C．cut in D．cleared up【解析】选D 句意：他自信的言语消除了我们对如何实施这个计划的疑虑。clear up“清除，解释，澄清，(天气)转晴”，符合句意。bring in“引进，生产，增加”；take up“拿起，开始从事(新工作等)，占据(时间，地方)”；cut in“插话，(突然)强行超车”。
5．Look before you leap! Why not ________ the advantages against the risks before you start?
C．defend D．fight【解析】选A 句意：三思而后行！为何不在开始之前权衡一下利弊呢？weigh在此处意为“权衡，认真考虑”。
6．I've visited a lot of different places and stayed in lots of different hotels, but none of them ________ this one.
C．compares D．matches【解析】选D 句意：我参观过许多不同的地方，住过很多旅馆，但没有一个能比得上这家。match“与……相媲美”，符合句意。
7．Our school has ________ a very good reputation depending on the affection atmosphere and advanced teaching approaches during the past 60 years.
A．picked out B．looked into
C．worked out D．built up
8．Mandela, described by his own people as a great leader with a fine strategic mind________ on December 5, 20xx at the age of 95, leaving the world.
A．passed on B．passed down
C．passed by D．passed away【解析】选D 由leaving the world可知，D项符合句意，pass away“去世”。pass on“传递，传给”；pass down“(世代)相传，传下来”；pass by“过去，逝去”。
9．It is reported that a similar technique can be ________ to the treatment of cancer.
C．added D．compared【解析】选A 句意：据报道一项类似的技术能被应用到癌症的.治疗中。apply“应用，适用”，符合句意。attach“附加，使依附”；add“加，增加”；compare“比较，对照”。
10． When I was chatting with her on the mobile phone, the battery ________ dead suddenly.
C．remained D．changed【解析】选A 句意：我正和她用手机聊天的时候，突然电池没电了。系表结构“go＋形容词”多表示“(从好的状态)变坏”。
11.The TV Dwelling Narrowness(《蜗居》)is really fantastic.The show has succeeded in (get across) much to the audience，which has contributed to its success.【解析】句意：电视剧《蜗居》真的很吸引人。它成功地和观众产生共鸣，这促进了它的成功。get across使……被理解。放在介词后的应为动名词。【答案】getting across
12. Considering his health，I advise him to (set aside) an hour or two each day to work out.【解析】句意：考虑到他的健康，我建议他每天抽出一到两个小时进行锻炼。set aside留出，拨出。【答案】set aside
13. Mary often does some translation work to earn extra money，which (accout for) half of her income.【答案】accounts for
14. “Judging the voice, and not the appearance” makes the show—The Voice of China (stand out) from the numerous other reality shows in China.【解析】stand out意思“引人注目”。句意：“判断声音而不是外貌”使得《中国好声音》在中国众多真人秀节目中引人注目。【答案】stand out
15.I don't know why he (break off) in the middle of a sentence.【解析】broke off 中断，突然停止。句意：我不知道他为什么话只说了一半就停止。【答案】broke off
16. He was about to do his homework when an unusual noise (arrest) his attention.【解析】句意：他刚要做作业，这时一个不寻常的声音吸引了他的注意力。【答案】arrested
17. It is bad manners to (拒绝) an invitation without a reason.【解析】句意：无故拒绝邀请是不礼貌的。turn down拒绝。【答案】turn down
18. Fully (absorb) in preparing for the coming exam，she no longer has time to enjoy the various activities in her neighborhood.【解析】句意：她完全聚精会神地准备即将到来的考试，所以她没有时间在社区参加各种各样的活动。absorbed聚精会神。【答案】absorbed
19. He was driving home on the highway last night when a policeman stopped him and (accuse) him of speeding.【解析】句意：昨晚，他在公路上开车回家，这时一个警察让他停下，指控他超速驾驶。accuse of是固定用法，意思是指控。【答案】accused
20. That hero who died in the war was so brave that he never (give in) to the enemies until death.【答案】gave in