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2019年高考英語一輪復習 第一部分 教材課文要點 Module 4 Sandstorms in Asia語篇解題微技巧 外研版必修3 推斷句題(七選五) 方法指導 在七選五中對推斷句的考查主要包括兩個層面。 1)段中推斷句:做題時閱讀空格前后的相鄰內(nèi)容,抓住體現(xiàn)邏輯關(guān)系的信號詞(thus、therefore、however等),確定上下文并列、遞進、轉(zhuǎn)折、因果等關(guān)系。 2)段尾推斷句:閱讀前文,鎖定高頻詞或體現(xiàn)邏輯關(guān)系的信號詞并且注意與下一段開頭的銜接關(guān)系。 典例引領(lǐng) (xx課標Ⅰ) 　　根據(jù)短內(nèi)容,從短文后的選項中選出能填入空白處的最佳選項。選項中有兩處為多余選項。 Secret codes(密碼)keep messages private. Banks, panies, and government agencies use secret codes in doing business, especially when information is sent by puter. People have used secret codes for thousands of years.　1　Code breaking never lags(落后)far behind code making. The science of creating and reading coded messages is called cryptography.? There are three main types of cryptography.　2　For example, the first letters of “My elephant eats too many eels”spell out the hidden message“Meet me.”? 　3　You might represent each letter with a number, for example. Let’s number the letters of the alphabet, in order, from 1 to 26. If we substitute a number for each letter,the message “Meet me”would read“13 5 5 20 13 5.”? A code uses symbols to replace words, phrases, or sentences. To read the message of a real code, you must have a code book.　4　For example, “bridge”might stand for “meet”and“out”might stand for “me”.The message“Bridge out”would actually mean“Meet me.”　5　However, it is also hard to keep a code book secret for long. So codes must be changed frequently.? A.It is very hard to break a code without the code book. B.In any language, some letters are used more than others. C.Only people who know the keyword can read the message. D.As long as there have been codes, people have tried to break them. E.You can hide a message by having the first letters of each word spell it out. F.With a code book,you might write down words that would stand for other words. G.Another way to hide a message is to use symbols to stand for specific letters of the alphabet. 方法運用 [語篇解讀]　本文是一篇說明文。介紹了密碼的用途、歷史以及三種密碼方式。 1.D　過渡句。上句提到:人們使用密碼已經(jīng)幾千年了。下句提到:密碼的破解從未太落后于密碼的設定。由此可知D項符合語境,意為“只要有密碼,人們就會盡力去破解它們?！? 2.E　過渡句。上句提到:有三種主要的密碼設定方式。下句提到:例如,“My elephant eats too many eels”的首字母就拼出了“Meet me”這一隱藏起來的信息。由此可知本句應該為一種密碼的設定方式,根據(jù)下句舉到的例子,可知E項正確,意為“你可以用每個單詞的首字母拼寫出一條信息,以此來隱藏它?！? 3.G　主旨句。上段指出有三種主要的密碼設定方式,上段已經(jīng)提到了一種,本段應該指出另外一種。下文舉例說明了用數(shù)字來代替字母的密碼方式,由此可知G項能起到統(tǒng)領(lǐng)本段的作用,意為“另外一種隱藏信息的方式就是用符號來代替字母表中特定的字母?！? 4.F　細節(jié)句。上句指出:要解讀某個真實密碼的信息,你必須要有密碼本。本句是對上句的解釋說明,結(jié)合下文舉到的例子,可推斷出本句主要解釋如何利用密碼本來破解隱藏起來的信息。F項符合語境,意為“擁有了密碼本,你也許就能寫出代表其他單詞的單詞?！? 5.A　細節(jié)句。上文指出了利用密碼本來破解密碼的方式。A項是總結(jié)上文內(nèi)容得出的結(jié)論,意為“沒有密碼本就很難破解密碼”,而且根據(jù)下句“...it is also hard to...”的句型結(jié)構(gòu)也可得知A項符合語境。