How far would you be willing to go to satisfy your need to know? Far enough to find out your possibility of dying from a terrible disease? These days that’s more than an academic question, as Tracy Smith reports in our Cover Story.

There are now more than a thousand genetic（基因的）tests, for everything from baldness to breast cancer, and the list is growing. Question is, do you really want to know what might eventually kill you? For instance, Nobel Prize-winning scientist James Watson, one of the first people to map their entire genetic makeup, is said to have asked not to be told if he were at a higher risk for Alzheimer’（老年痴呆症）.

“If I tell you that you have an increased risk of getting a terrible disease, that could weigh on your mind and make you anxious, through which you see the rest of your life as you wait for that disease to hit you. It could really mess you up.” Said Dr. Robert Green, a Harvard geneticist.

“Every ache and pain,” Smith suggested, could be understood as “the beginning of the end.”“That ’s right. If you ever worried you were at risk for Alzheimer’s disease, then every time you can’t find your car in the parking lot, you think the disease has started.”

Dr. Green has been thinking about this issue for years. He led a study of people who wanted to know if they were at a higher genetic risk for Alzheimer’s. It was thought that people who got bad news would, for lack of a better medical term, freak out. But Green and his team found that there was“no significant difference”between how people handled good news and possibly the worst news of their lives. In fact, most people think they can handle it. People who ask for the information usually can handle the information, good or bad, said Green.

71.The first paragraph is meant to__________.

A. ask some questions                        B. introduce the topic

C. satisfy readers’ curiosity                 D. describe an academic fact

【答案】B

【解析】通过两个问题引出话题。

72.Which of the following is true of James Watson？

A. He is strongly in favor of the present genetic tests.

B. He is more likely to suffer from Alzheimer’s disease.

C. He believes genetic mapping can help cure any disease.

D. He doesn’t want to know his chance of getting a disease.

【答案】D

【解析】根据第二段Nobel Prize-winning scientist James Watson, one of the first people to map their entire genetic makeup, is said to have asked not to be told if he were at a higher risk for Alzheimer’。“James Watson要求如果他的基因表明他有很高的老年痴呆症的可能不要告诉他。”

73.According to Paragraphs 3 and 4, if a person is at a higher genetic risk, it is__________.

A. advisable not to let him know          B. impossible to hide his disease

C. better to inform him immediately      D. necessary to remove his anxiety

【答案】A

【解析】根据这两个自然段可知，如果你提前被告知你将来可能患某种可怕的疾病会mess you up。

74.The underlined part“freak out”in Paragraph 5 is closest in meaning to“_________”.

A. break down                     B. drop out            C. leave off            D. turn away

【答案】A

【解析】根据下文But的转折，以及no significant difference可知，freak out的意思是A（精神垮掉）。

75.The study led by Dr. Green indicates that people__________.

A. prefer to hear good news         B. tend to find out the truth

C. can accept some bad news              D. have the right to be informed

【答案】C

【解析】根据第五段内容 In fact, most people think they can handle it可知答案选C.

That year , in the local school, there was a new math teacher, as well as some new pupils. One of the new kids was the stupidest child anyone had ever seen. It made no difference how quickly or how slowly they tried explaining numbers to him; he would always end up saying something enormously stupid. Like two plus two was five, seven times three was twenty-seven, or a triangle had thirty corners……
Before this boy arrived, math lessons had been the most boring of all. Now they were great fun. Encouraged by the new teacher, the children would listen to the pieces of nonsense spouted by the new kid, and they would have to correct his mistakes.
Whenever the new teacher asked questions, the stupid kid would stand up but made the wrong answers, the other students all wanted to be the first to find his mistakes, and then think up the most original ways to explain them. To do this they used all kinds of stuff : sweets, playing cards, oranges, paper planes, etc. It didn’t seem like any of this bothered the new kid.
However, Little Lewis was sure that it was bound to make him feel sad inside. Lewis was sure he would see him crying. So, one day, he decided to follow the new kid home after school. On leaving school, the new kid walked a few minutes to a local park, and there he waited for a while, until someone came along to meet him……
It was the new teacher!
The teacher gave the new kid a hug, and off they went, hand in hand. Following from a distance, Lewis could hear they were talking about math.
【小题1】根据短文第二三段描述，可知这位新老师的工作很有创造性，故选A。
【小题2】根据短文最后一段Following from a distance, Lewis could hear they were talking about math.描述，可知选B，这个所谓的最蠢的学生其实比其它学生知道的多。
【小题3】根据Lewis was sure he would see him crying. So, one day, he decided to follow the new kid home after school.描述，可知选B。
【小题4】联系上文To do this they used all kinds of stuff :可知选C。
【小题5】The math lessons became interesting again because of the new teacher’s ___________.

This dictionary tells you about English words and how to use them in reading, writing and speaking English. It not only gives the meaning of words, it can also help you with spelling, word-building, grammar and pronunciation.

To use your dictionary correctly, you need to understand how the dictionary works. At the front of the book, you will find some exercises to help you make the most use of your dictionary.

If you look up the word “colour”, you will find two spellings for this word. “Colour” is used in British English, while “color” is used in American English. When there are differences between British and American spelling, the dictionary shows it with the word “BrE” for British English and “AmE” for American English.

The dictionary also helps you pronounce words correctly. We use a special alphabet (特殊字母) to show pronunciation. If you turn to the inside back face, you will see all the phonetic letters (音标) with some words to show you how they are pronounced. Just look at the inside back cover when you’re not sure how to say a word.

The most important reason for using a dictionary is to find out the meaning of a word—its definition

In this dictionary, the definitions have been written using only 2000 words. This means that the definitions of even the most difficult words are simply explained and easy to understand.

When a word has more than one meaning, read all the meanings until you find the one that correctly tells the use of the word you are looking for.

Most of the words in this dictionary can be used by people in all parts of the world.

1.The AmE spelling of the Chinese word “颜色” in this dictionary is ________.

A．colour            B．colar             C．color             D．corner

2.The phonetic alphabet help you ________ each word correctly.

A．understand        B．write             C．say              D．know

3.The underlined word ‘definition’ means__________

A．词性             B．词条             C．词义             D．词库

4.The dictionary explains ________.

A．some of the difficult words

B．all the words in the dictionary in a simple way

C．all easy words

D．the words with two meanings

This dictionary tells you about English words and how to use them in reading, writing and speaking English. It not only gives the meaning of words, it can also help you with spelling, word-building, grammar and pronunciation.
To use your dictionary correctly, you need to understand how the dictionary works. At the front of the book, you will find some exercises to help you make the most use of your dictionary.
If you look up the word “colour”, you will find two spellings for this word. “Colour” is used in British English, while “color” is used in American English. When there are differences between British and American spelling, the dictionary shows it with the word “BrE” for British English and “AmE” for American English.
The dictionary also helps you pronounce words correctly. We use a special alphabet (特殊字母) to show pronunciation. If you turn to the inside back face, you will see all the phonetic letters (音标) with some words to show you how they are pronounced. Just look at the inside back cover when you’re not sure how to say a word.
The most important reason for using a dictionary is to find out the meaning of a word—its definition
In this dictionary, the definitions have been written using only 2000 words. This means that the definitions of even the most difficult words are simply explained and easy to understand.
When a word has more than one meaning, read all the meanings until you find the one that correctly tells the use of the word you are looking for.
Most of the words in this dictionary can be used by people in all parts of the world.
【小题1】The AmE spelling of the Chinese word “颜色” in this dictionary is ________.

 This dictionary tells you about English words and how to use them in reading, writing and speaking English. It not only gives the meaning of words, it can also help you with spelling, word building, grammar and pronunciation.

To use your dictionary correctly, you will find two spellings for this word. “Colour” is used in British English, while “color” is used in American English. When there are differences between British and American spelling, the dictionary shows it with the word “BrE” for British English and “AmE” for American English.

The dictionary also helps you pronounce words correctly. If you turn to the inside back face, you will see all the phonetic letters (音标 ) with some words to show you how they are pronounced. Just look at the inside back cover when you're not sure how to say a word.

The most important reason for using a dictionary is to find out the meaning of a word — its definition.

In this dictionary, the definitions have been written using only 2, 000 words. This means that the definitions of even the most difficult words are simple and easy to understand.

1.________ of the words in the dictionary have two spellings.

2.What is the main reason for us to use a dictionary？

3.The phonetic letters helps you ________ each word correctly.

4.The Chinese meaning of “definition” here is________.

5.How many words are there in this dictionary?