2017年12月四级选词填空真题解析

2017-12-18 10:21:15来源:网络

  新东方在线英语四级频道考后发布2017年12月四级选词填空真题解析,同时新东方实力师资团队将对英语四级真题答案做权威解析,免费领取大学英语四级真题解析课程。更多2017年12月英语四级听力真题及答案、英语四级作文真题及范文、英语四级阅读真题及答案、英语四级翻译真题及答案,请查看【2017年12月英语四级真题答案解析专题。预祝大家高分通过大学英语四级考试!

2017年12月英语四级真题及答案大汇总
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2017年12月四级选词填空真题解析

新东方在线

  Part Ⅲ Reading Comprehension ( 40 minutes )

  Section A

  Directions: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the centre. You may not use any of the words in the bank more than once.

  A rat or pigeon might not be the obvious choice to tend to someone who is sick, but these creatures have some 26 skills that could help the treatment of human diseases.

  Pigeons are often seen as dirty birds and an urban 27 , but they are just the latest in a long line of animals that have been found to have abilities to help humans. Despite having a brain no bigger than the 28 of your index finger, pigeons have a very impressive 29 memory. Recently it was shown that they could be trained to be as accurate as humans at detecting breast cancer in images.

  Rats are often 30 with spreading disease rather than 31 it, but this long-tailed animal is highly 32 . Inside a rat's nose are up to 1,000 different types of olfactory receptors (嗅觉感受器), whereas humans only have 100 to 200 types. This gives rats the ability to detect 33 smells. As a result, some rats are being put to work to detect TB(肺结核). When the rats detect the smell, they stop and rub their legs to 34 a sample is infected.

  Traditionally, a hundred samples would take lab technicians more than two days to 35 , but for a rat it takes less than 20 minutes. This rat detection method doesn't rely on specialist equipment. It is also more accurate — the rats are able to find more TB infections and, therefore, save more lives.

  A) associated I) slight

  B) examine J) specify

  C) indicate K) superior

  D) nuisance L) suspicious

  E) peak M) tip

  F) preventing N) treated

  G) prohibiting O) visual

  H) sensitive

  一、解题步骤

  1选项词性分类---------根据词后缀和基本词汇量

  2原文空格处词性判断-------根据基本语法(时态 语态 基本句子结构词性搭配)

  3 原文空格处语义判断-------根据逻辑关系

  4 结合词性和逻辑关系确定选项

  二、答案解析

  26 正确答案 k

  语法判断:空格前为some,空格后为skills,所以空格处应为形容词词性。所以备选选项为associated, sensitive, slight, superior, suspicious, visual

  语义判断:空格前由not be the obvious choice to tend to someone who is sick可知,该句为贬义,但是but转折,所以空格句应为积极意义,选褒义词,故答案为superior(优秀的,上级的)。slight(轻微的,不重要的,脆弱的),suspicious(可疑的)为贬义,不符合题意。associated (相关的),sensitive(敏感的),visual (视觉的)为中性词,不符合题意。

  27 正确答案D

  语法判断:空格前为an urban,空格后为逗号,所以空格处应为名词词性。所以备选选项为 nuisance,peak,tip。

  语义判断:空格前为dirty birds and an urban, 根据and前后褒贬意思统一可知,an urban ___也为贬义,因为urban 是中性词,所以空格处应为贬义词,故答案是nuisance(讨厌的人,麻烦事)。peak(山峰,顶点),tip(小费,尖端,小窍门)为中性词,不符合题意。

  28正确答案 M

  语法判断:空格前为the,空格后为of,所以空格处应为名词词性。所以备选选项为peak,tip。

  语义判断:空格后为 of your index finger, 结合备选选项peak,tip,可以推断意思应为食指尖,食指尖固定搭配 the tip of your index finger。peak (山峰,顶点)不符合题意。

  29正确答案O

  语法判断:空格前为impressive,空格后为memory,所以空格处词性为形容词或名词,又因为名词选项只剩下一个peak,无法与memory搭配,所以空格处词性可以判断为形容词。备选选项有associated, sensitive, slight, suspicious, visual

  语义判断:空格前半句是由despite引导的让步状语从句,根据having a brain no bigger than the tip of your index finger可知,前半句为贬义,又因为despite前后褒贬色彩相反,所以空格句感情色彩为褒义,故排除L suspicious(可疑的)slight(轻微的,不重要的,脆弱的)贬义。又因为第二段最后一句 为be as accurate as humans at detecting breast cancer in images,所以空格处形容词应与detecting (察觉)相关,故选visual(视觉的),排除associated (相关的),sensitive(敏感的)。

  30正确答案为A

  语法判断:空格前为Rats are often ,空格后为with,所以空格处应为被动语态,进行时或者形容词。备选选项有:进行时:preventing,prohibiting。被动语态assocaited, treated. 形容词:sensitive,slight,suspicious。

  语义判断:空格后为spreading disease rather than ___,因为rather than 后为空格,所以无法判断语义。又因为but 句后is highly ___,所以无法判断语义。根据后面Inside a rat's nose are up to 1,000 different types of olfactory receptors (嗅觉感受器), whereas humans only have 100 to 200 types.可知为褒义,故可推断出but this long-tailed animal is highly 为褒义,but前后转折,所以空格处应为贬义或中性,即是与spreading disease 相关,故选associated。排除preventing(阻止),prohibiting(阻止,禁止),suspicious(可疑的)slight(轻微的,不重要的,脆弱的)。treat (治疗,对待)treat sb/sth with sth (用…治疗…) 。 sb be treated like/as sth (像…被对待)不符合题意。Be sensitive to/about sth (对… 敏感) ,故排除。

  31正确答案F

  语法判断:空格前为rather than,空格后为it,rather than结构前后并列,rather than前为spreading,故空格处也为动词ing形式,备选答案为preventing,prohibiting。prevent 和prohibit 均有阻止的意思,prohibit还有禁止的意思。prevent sb/sth (from) doing sth. prohibit sb from doing sth 但是prohibit一般用于被动语态。故此空选preventing

  32正确答案H

  语法判断:空格前为is highly,空格后为句号。所以空格处词性形容词或者动词过去分词,备选选项有treated,sensitive,slight,suspicious

  语义判断:空格前一句为贬义,but 转折,前后意思相反,所以空格句应为褒义,故排除slight(轻微的,不重要的,脆弱的),suspicious(可疑的),没有be highly treated 这种搭配,故排除,所以答案为sensitive(敏感的)。

  33正确答案L

  语法判断:空格前为动词detect,空格后为名词smells句号。所以空格处为名词或形容词。又因为名词备选选项只剩peak(山峰,顶点),不符合题意,所以空格处为形容词。

  语义判断:所剩形容词选项只有slight(轻微的,不重要的,脆弱的) 和suspicious(可疑的)。前文提到Inside a rat's nose are up to 1,000 different types of olfactory receptors (嗅觉感受器), whereas humans only have 100 to 200 types. 老鼠嗅觉感官器多,下文的意思是This gives rats the ability to detect __33 smells. 这使得它们能够发现可疑味道,故选suspicious。

  34正确答案C

  语法判断:空格前为to, 空格后为a sample, 所以空格处应为动词原形,备选选项为examine,indicate,specify。

  语义判断:空格前为they stop and rub their legs to , 空格后为a sample(样本)。examine(仔细检查),indicate(表明,指出),specify(详细说明,详述)故老鼠停下来,揉揉腿部,指出有感染源的样本,而不是检查或者详述。

  35正确答案B

  语法判断:空格前为two days to ,空格后为句号,所以空格处为动词原形,备选选项为examine,specify

  语义判断:空格前强调样本在实验室,需要两天多的时间来___, 在实验室,应该是检查,而不是详细说明,故排除specify(详细说明,详述),正确选项为examine(仔细检查)。

  以上是新东方在线对四级选词填空的逐题解析,感谢同学们的关注。

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