2017-2018学年高三英语寒假提升练习-每日一题DAY 18

♋每日练真题♌DAY 18
时间：20分钟得分：
一、7选5
根据短文内容, 从短文后的选项中选出能填入空白处的最佳选项, 选项中有两项为多余选项｡
Secret codes (密码) keep messages private｡Banks, companies, and government agencies use secret codes in doing business, especially when information is sent by computer.
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, th e 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 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.
二、短文改错
假定英语课上老师要求同桌之间交换修改作文, 请你修改你同桌写的以下作文｡文中共有10处语言错误, 每句中最多有两处｡每处错误仅涉及一个单词的增加､删除或修改｡
增加: 在缺词处加一个漏字符号(∧), 并在其下面写出该加的词｡
删除: 把多余的词用斜线(\)划掉｡
修改: 在错的词下划一横线, 并在该词下面写出修改后的词｡
注意: 1. 每处错误及其修改均仅限一词;
2. 只允许修改10处, 多者(从第11处起)不计分｡
The teenage year from 13 to 19 were the most difficult time for me . They were also the best and worse years in my life . At the first, I thought I knew everything and could make decisions by yourself. However, my parents didn’t seem to think such. They always tell me what to do and how to do it. At one time , I even felt my parents couldn’t understand me so I hoped I could be freely from them. I showed them I was independent by wear strange clothes. Now I am leaving home to
♍♎
反思&笔记
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college. At last, I will be on my own, but I still want to have my parents to turn to whenever need help.
♌答案及解析♌
一、7选5
【答案】
1-5：D E G. F A
1. D 本题考察是逻辑关系, 根据下一句"code breaking never lags behind code making"可知上一句是只要出现密码, 就会有人去解码, 选项D中的break与空格后面句中的breaking构成一种复现; 故选D.
2. E 本题考察是句子之间的例证关系, 从后面文章的举例中For example, the first letters of “My elephant eats too many eels” Spell out the hidden message “Meet me. ” 那么前一句应该是对例子的概括, 即我们可以知道是运用每个单词的首字母来组成密码, E选项正确
3. G 本题考察是文章的篇章结构, 前一段是讲到了第一种方法, 根据篇章结构, 下一段应该是讲述第二种设置密码的方法, 而根据该段的例子, 即字母表中字母排列顺序转化成为数字信息, 所以这里关键词是another way 还有alphabet, 故选G.
4. F 本题考察的是逻辑关系, 从上一句"To read the message of a real code, you must have a code book"你需要借用解码书来找出密码单词所对应真正意思, F选项表示你应该找出解码书中密码所代表的词语, 故F正确.
5. A 本题考察的是关键词以及转折关系, 根据下一句出现"it is also hard to keep a code book secret for long, "这里出现了also hard, 所以上一句关键词为hard; 另外however表示转折关系, 证明上一句与下一句表达相对应; 故选A.
二、短文改错
【答案】
第一行: year---years teenage years青少年应该是一段时间, 为可数名词复数, 需在year后加s
第二行: worse---worst; and为并列连词, the best相对的是the worst, 应为最高级, 故为worst.
At the first---At first, 固定搭配, 连词at first, 因此去掉定冠词the.
第三行: by yourself---by myself; 对象错误, 前面说的是I thought I knew everything, and为并列连词, 后面还是在说自己, 因此应该是myself.
think such---think so句意"但我父母不这么认为", 应为"they don't think so. "因此, such 应该为so, 指代前面的一个观点.
第四行: tell me---told me
时态错误. 是对过去事情的描述, 因此要用一般过去时, 过去式为told.
第五行: freely---free; could be后面加上表语, 应为形容词作表语, 因此为free. by wear---by wearing。

介词by后需加上动名词, 因此为wearing.
第六行: leaving home to college---leaving home for college介词使用错误, 表示目的应用目的介词for.
第七行: whenever need help---whenever I need help。

whenever引导时间状语从句, 句中缺少主语I, 因此需加上人称代词I.。