题目内容

【题目】—As teenagers, we should develop a habit of learning for a lifetime.

—I totally agree. Because the most beautiful thing about learning is that ________ can take it away from you.

A.somebodyB.anybodyC.nobodyD.everybody

【答案】C

【解析】

句意:——作为青少年,我们应该养成终生学习的习惯。——我完全同意。因为关于学习最美好的事情就是没有人可以把它从你身上夺走。

考查不定代词辨析。somebody某人;anybody任何人;nobody没有人;everybody每个人。根据句意可知,这里用nobody符合题意,表示“没有人能夺走”。故选C

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【题目】Choose the best answer and complete the passage (选择最恰当的选项完成短文)

Secret codes 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. As long as there have been codes, people have tried to break them. Code breaking never ______ code making. The science of creating and reading coded messages is called cryptography(密码系统).

There are three main types of cryptography. You can ______ a message by having the first letters of each word spell it out. For example, the first letters of “My elephant eats too many eels(鳗)” spell out the message “Meet me.”

Another way is to use symbols to ______ specific letters of the alphabet. 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 replace each letter with a number, the message “Meet me” would read “13, 5, 5, ______, 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. With a code book, you might write down words that would be ______ as other words. For example, “bridge” might refer to “meet” and “out” might mean “me.” The message “Bridge out” would have meaning of “Meet me”. It is very hard to break a code with out the code book. Actually, it is also hard to keep a code book secret for long. ______, codes must be changed frequently.

1A.goes aheadB.takes the place ofC.falls behindD.depends on

2A.sendB.takeC.translateD.hide

3A.stand forB.make upC.deal withD.find out

4A.17B.18C.19D.20

5A.explainedB.misunderstoodC.rememberedD.acted

6A.HoweverB.ThereforeC.In additionD.Otherwise

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