1.The number of smokers, _________ is reported, has dropped by 17 percent in just one year.

A it

B which

C what

D as

解析：选D。D　考查非限制性定语从句。句意：据报道，吸烟者的数量在一年内下降了17%。考查定语从句。as引导的定语从句，as既作主语又作连接词，“正如……”。本题易误选which。抓住这一结构:as is reported/known/said/expected/planned/mentioned/…，正如……。解题就容易了。

2.Schools should be lively places where individuals are encouraged to ______ to their greatest potential.

A accelerate

B improve

C perform

D develop

解析：选D。D　考查动词辨析。句意：学校应该是活泼好动鼓励个人发展他们的最大潜力的地方。accelerate 加速；improve 改善；perform 执行；develop 发展。

3.—Jim, can you work this Sunday? —_______? I've been working for two weeks on end.

A Why me

B Why not

C What if

D So what

解析：选A。A　考查情景交际。句意：——Jim，这个星期天你能工作吗？ ——为什么是我？我已经连续工作两个星期了。Why me 为什么是我；Why not 为什么不；What if 如果……又能怎样；So what 那又怎样；Why me是“Why do you ask me to work this Sunday”的省略。

4.Much time ________ sitting at a desk, office workers are generally troubled by health problems.

A being spent

B having spent

C spent

D spending

解析：选C。C　考查非谓语动词。句意：大部分时间坐在办公室工作太久，办公室职员通常被健康问题所困扰。time 与spend之间构成被动关系，另外该题实际考查了非谓语动词的独立主格结构，分词的逻辑主语与后面主句的主语不一致。

5.________ Li Bai, a great Chinese poet, was born is known to the public, but some won't accept it.

A That

B Why

C Where

D How

解析：选C。C　考查名词性从句。句意：李白，一个伟大的中国诗人，其出生地是众所周知的，但也有一些人不接受它。where Li Bai was born作该句子的主语，其他选项不符合题意。注意，a great Chinese poet做的是Li Bai的同位语。

6.It is so cold that you can't go outside ________ fully covered in thick clothes.

A if

B unless

C once

D when

解析：选B。B　考查状语从句。句意：外面很冷，如果你全身没有穿着厚衣服的话你不能出去。if 如果；unless 除非；once 一旦；when 当……的时候。该题实际上也考查了状语从句的省略，其完整形式为 unless you are fully...

7.The university started some new language programs to _________ the country's Silk Road Economic Belt.

A apply to

B cater for

C appeal to

D hunt for

解析：选B。B　考查动词短语辨析。句意：大学开始开设一些新的语言项目，以迎合中国的丝绸之路经济带。apply to 适用于，申请；cater for 迎合，满足所需；appeal to 呼吁，上诉；hunt for 搜寻。

8.It might have saved me some trouble _________ the schedule.

A did I know

B have I known

C do I know

D had I known

解析：选D。D　考查虚拟语气。句意：要是知道这个时间表的话，可能会省去我的一些麻烦。从might have saved可以看出，该题是对过去的假设，相当于 if I had known。当if省略了的时候就需要倒装，故选D。

9.The whole team ________ Cristiano Ronaldo, and he seldom lets them down.

A wait on

B focus on

C count on

D call on

解析：选C。C　考查动词短语辨析。句意：整个团队依靠Cristiano Ronaldo，他很少让他们失望。wait on 服侍，焦急的等待；focus on 集中于，关注；count on依靠，指望；call on 拜访，号召，呼吁。

10.The real reason why prices _______, and still are, too high is complex, and no short discussion can satisfactorily explain this problem.

A were

B will be

C have been

D had been

解析：选A。A　考查动词时态。句意：价格过去和现在仍然过高的原因是复杂的，没有简短的讨论可以令人满意地解释这个问题。根据and still are可以推断出空白处是对过去时态的考查。

11.The police officers decided to conduct a thorough and _______ review of the case.

A comprehensive

B complicated

C conscious

D crucial

解析：选A。A　考查形容词辨析。句意：警方决定对该案件进行彻底和全面的审查。comprehensive 综合的，全面的；complicated 复杂的；conscious 有意识的；crucial 至关重要的。

12.Some schools will have to make ________ in agreement with the national soccer reform.

A judgments

B adjustments

C comments

D achievements

解析：选B。B　考查名词辨析。句意：为了与国家足球改革相一致，一些学校将做出调整。judgement 判断；adjustment 调整；comment 评论；achievement 成果；成就。

13.—Why didn't you invite John to your birthday party? —Well, you know he's ________.

A an early bird

B a wet blanket

C a lucky dog

D a tough nut

解析：选B。B　考查情景交际。句意：——为什么你没邀请约翰参加你的生日聚会？——唉，你知道他是一个令人扫兴的人。an early bird 早起的人；早到者；a wet blanket 令人扫兴的人或物；a lucky dog幸运儿； a tough nut难对付的人；本题考查英语俗语，较难。

14.Many of the things we now benefit from would not be around __________ Thomas Edison.

A thanks to

B regardless of

C aside from

D but for

解析：选D。D　考查介词短语辨析。句意：如果没有托马斯·爱迪生的话，我们现在所受益的许多东西是不会出现的。thanks to幸亏，由于；regardless of不管，不顾；aside from除了，除……以外；but for如果没有的话。

15.—Go and say sorry to your Mom, Dave． —I'd like to, but I'm afraid she won't be happy with my _______.

A requests

B excuses

C apologies

D regrets

解析：选C。C　考查名词辨析。句意：——去跟你的妈妈说道歉， Dave？——我想，但我担心她不会接受我的道歉。根据say sorry to可知C项正确。