1．On June 26.2000.two scientists.called Francis Collins and Craig Venter.told the world that they co——青夏教育精英家教网—

On June 26，2000，two scientists，called Francis Collins and Craig Venter，told the world that they could now read the whole"map"of the human body：DNA．DNA is something that everybody has，and it tells the body what to do．DNA is the reason that we look like our mother and father，because we get some of their DNA to make our own．
People have been trying to understand the human body for a long time．In 1860，Gregor Mendel discovered a special reason why we look the same as other people in our family．It is because of small things named "genes" in our body．In 1953，James Watson and Francis Crick made another discovery and found out that those small parts are real messages written in the DNA with a special language．
In 1961，Marshall Nirenberg and Johann Matthaei found a message in DNA showing how DNA tells the cell （细胞） to build its parts．Scientists have now found all the words in the DNA map，but we still do not understand what they all do．By understanding what just one"word"means，we can help save more people from several illnesses．
Most people hope that this will help make better medicine and help sick people．Other people worry that when people begin to know more words and find out lots of other information，we might use it in a wrong way，just to make people more attractive，or stop sick people from getting jobs．Man would have to meet a lot of trouble if DNA technic wasn't limited in use．
46．When did we first know why we look like other people in our family？D
A．In 1860．B．In 1953．C．In 1961．D．In 2000．
47．What does the underlined word"gene"mean？C
A．The"map"of DNA．B．A special language．
C．Small parts of DNA．D．DNA．
48．What did the two scientists first discover in 1961？D
A．The"map"of DNA．B．A new illness．
C．The language of DNA． D．A message of DNA．
49．What can we do if we understand some"words"of the language inside the body？B
A．Make people get new jobs．B．Make medicine for illnesses．
C．Make maps of human．D．Make people less attractive．
50．What do people think about this work？A
A．It can cause good or bad resutls．B．It can cause only good results．
C．It can cause good results but won't work．D．It can cause only bad results．

3．You must need desks in your life，but how do you know whether you have the right desk？Well，the right desk should be the right size．You should think about the size in terms of how much room you get on the desk．If you need to deal with a lot of paperwork，you are supposed to buy a large desk．If you are short of space，you should be looking for a small desk．The best way，if you are short of space，is to measure （测量） the area where the desk will sit and go with them to the store； they are usually quite happy to help you get the size right．
Also，the right desk should have drawers （抽屉）．Drawers allow you to keep a tidy desk．If you do not have filing cabinets （文件柜），choose a desk with many drawers-you will probably need them．If you have filing cabinets，one or two drawers should be enough to hold the basics such as keys and snacks．
If you are quite short or very tall，there are office furniture shops that have tables with legs that can be adjusted （调节）．With the simple turn of a screw （螺丝），you can make them become taller or shorter．
Look at the material that the desk is made of．The last thing you want is to shop for a desk again in a few years．The best desks are made of hardwood，because they can last for years and years．However，there will be a problem if you are having only a few money-they cost quite a bit of money．There are hardboard desks that are quite good-they do not last as long as hardwood desks but you will get value for your money．You may find desks made of glass，but you must be very sure that they are of high quality before you buy them．
The finish （抛光） is just as important as the material the desk is made of．If it gets messed up before the desk is old，you will still want to replace the desk．Look for a great finish that can last as long as the desk is expected to．The best way to do this is to find a desk that you like and then look on the Internet for the kind of finish that it comes with．Again，a wood finish is one of the best that you can get．

How to choose the right desk？
Paragraph outlines	Supporting details
Size	●Choose the size of the desk according to how much room you need． ●Buy a large desk if you have lots of paperwork to deal with． ●For limited space，choose a small desk or get the size right with the （1）help of the store．
Drawers	●Drawers can help keep the desk clean． ●Choose a desk with the proper （2）numberof drawers．
Legs	●Choose a desk with adjustable legs if you are quite short or very tall． ●By turning the screws，you can have the desk （3）fit you well．
Material	●Choose a hardwood desk though it may be quite （4）expensive． ●Hardboard desks are good but don't last longer than hardwood ones． ●Make sure it is of high quality before you choose a glass desk．
Finish	●Choose a desk whose finish doesn't get messed up （5）easily． ●You can buy such a desk online． ●A wood finish is one of the best that you can get．

2．I don't want to brag （吹嘘），OK，maybe I do want to a little．I have two very smart daughters．My oldest is 7and she is one of the best students in her second grade class and my youngest，who is 2，is learning new things every day．When it comes to their cleverness，I believe this is because they love reading．
When my wife and I first became parents，we were told by a number of people that the best thing we could do for our kids was to encourage them to read．However，with things like television and video games out there，we found it was sometimes hard to make books seem more interesting．But，we succeeded with both of them by doing a few different things．
One of the first things we did was reading to them．My youngest daughter can't read books herself yet．But，I also take the time to read to my oldest daughter，too．Not only is this a great way to bond with your kids and make them like you，it also introduces them to a world that they might not realize．One thing I recommend is making sure you plan first so you have plenty of time to read more than one book if they want it．This allows you to read their favorite stories while mixing in something new，too．
Another thing I started doing with my oldest daughter is having her read to her younger sister．This makes her practice reading out loud something she gets to do at school and loves to and I've noticed my 2-year-old seems to pay closer attention to the stories for some reason．The second thing we do with our kids is we challenge them to read outside their level．I have given my oldest daughter books that are a little more complicated （复杂的）．I do this so she doesn't get bored with"kids"books．For example，the other day，I had her try to read a Sherlock Holmes story．It was a bit hard．But，she understood it enough and she wanted to read it again with my help．
I also encourage her to read newspapers and magazines．I do the same thing when I read to my youngest daughter and will sometimes borrow one of her sister's books．So far，she's still paying attention when I read them．Third，and most important，I let them be kids and consider their interests．Reading is a great thing．But，you can get too much of a great thing，too．I let them mix in television，video games，etc．This keeps reading a bit more exciting for them because they like reading the books that they want to rather than think I'm forcing them to read instead of letting them do other things．
34．What makes the writer feel difficult isC．
A．how his children improve their reading and writing
B．that his youngest daughter can't read books
C．how to keep TV and video from disturbing his cildren
D．how he finds interesting and good books for his kids
35．What does the underlined phrase"bond with your kids"in Paragraph 3mean？A
A．Having a good relationship with your kids．
B．Encouraging your children to learn a lot．
C．Making your kids feelvery surprised．
D．Making your kids live freely．
36．Why does the writer let his oldest daughter read a Sherlock Holmes story？B
A．His oldest daughter likes the books that adults read．
B．The writer wants his daughter not to lose her interest in reading．
C．The writer wants to know whether his daughter can understand it．
D．The writer wants to show off his daughter's reading ability．
37．According to the writer，which of the following ways are helpful to kids'reading？D
①Letting kids watch TV and play games．
②Reading kids'favourite books only with something new to them．
③Encouraging kids to read newspapers and magazines．
④Having older kids read to younger ones．
⑤Having kids read as adults do．
A．①②③
B．②③④
C．③④⑤
D．①③④

1．America is the world's largest food exporter （出口商）．But the worst drought （干旱） in half a century is hitting corn and wheat harvests．
By twenty-fifty，the world will have to produce at least sixty percent more food to feed more and more people．China，a major food importer （进口商），is looking to producers around the world to make sure it can get enough food in the future．
The serious drought in the United States is adding to care about world food and prices．China has invested （投资） in food production in Australia and New Zealand．A new source （来源） of food is Ukraine．Ukraine was known as the breadbasket of Europe because of rich corn and wheat harvests a century ago．
Galyna Kovtok is chief manager of Ukraine's largest agricultural business，ULF．She says that within a few months her company will export corn to China．That will make Ukraine the first country outside the Americas to do so．Across the Black Sea area-in Ukraine，Russia and Kazakhstan-drought this year is pushing harvests down by fifteen to twenty percent．
Traditionally，the Black Sea area is the main source of wheat for North Africa and the Middle East．But this year，Russia may have to suspend exports．However，Africa and the Middle East are now having competition with China．
31．We can know from the passage that AmericaC．
A．has a good wheat harvest this summer
B．will import wheat from other countries
C．suffers a lot from the drought
D．won't be the world's largest food exporter any more
32．China is investing in Ukraine mainly toA．
A．make sure of getting its future food
B．help the poor people there
C．build up a good relationship with Ukraine
D．have competition with Africa and the Middle East
33．The underlined word"suspend"in the last paragraph means"D"．
A．increase
B．encourage
C．protect
D．stop．

20．Have you felt nervous when a mobile phone rings during the class？Something must be done to stop this．Now in New York City，USA，a rule is carried out in schools．Students can't even bring mobile phones to school．Is it a good thing or not？
Worried parents say that mobile phones are an important tool in holding New York city's families together．"I worry about it，"said Elizabeth Lorris Ritter，a mother of a middle school kid，"It's necessary in our everyday life．We have a washing machine．We have running water，and we have mobile phones．"Many American parents think mobile phones connect them to their children on buses，getting out from undergrounds，walking through strange places．"I have her call me when she gets out of school，"said Lindsay Walt，a schoolgirl's mother．"No one in New York is going to let their child go to school without a mobile phone．"
What about the mobile phone owners，the students？Most of the students say mobile phones are necessary and the mobile phone is like an extra hand or foot for them．"I feel so empty，"said May Chom，14．"There is also no way to listen to music on the way to school without my phone．It will be a really，really boring trip．"
25．Students often use a mobile phoneA according to the passage．
A．to enjoy listening to music
B．to make phone calls to their teachers
C．to work as running water
D．to work as a washing machine
26．Which of the following statements is TRUE？C
A．Mobile phones can help students learn better．
B．Mobile phones only bring troubles to the school life．
C．Mobile phones connect children with their families when they are outside．
D．Many American parents don't think mobile phones are necessary for the students．
27．The article is about theC in carrying out the rule-not to use a mobile phone in
school．
A．happiness
B．interest
C．problem
D．expense（费用）

19．There was once a young man who liked puppets （木偶） so much that he was apprenticed （当学徒） to a master puppet-maker．Sadly，the young man was not very clever，and his （15）B and other apprentices were always telling him that he had no ability when it came to making puppets，and that he would not（16）C．
Even so，he enjoyed it so much that he worked day after day to improve．Though he put all his effort into it，they would always find something （17）A with the puppets he had made，and they ended up driving him out of the workshop．
He wasn't going to give up，so the young man decided that from then on he would spend all his time making just one kind of puppet．And whenever he found a fault （瑕疵） in his puppet he would throw it away and （18）B again right from the starting-point．Years passed，and with each （19）D
attempt （尝试） his puppet became a little bit better．By now，his puppet was much better than anything his old apprentices could make，but he （20）C making improvements．Living like that，the man wasn't making any money，and many people laughed at how （21）D he was．
By the time he was an old man，his puppet was truly wonderful．Finally one day，after so many years of effort，he finished his puppet，and said，"I can't find anything wrong with it．This time it
is （22）B．"And for the first time in all those years，instead of （23）D his puppet，he put it on the shelf，feeling truly satisfied and happy．The puppet gave that old man more （24）Bthan any other famous puppet-makers ever got from their creations．

15．A．father	B．teacher	C．classmate	D．friend
16．A．miss	B．forget	C．succeed	D．listen
17．A．wrong	B．interesting	C．special	D．unusual
18．A．stop	B．start	C．change	D．appear
19．A．usual	B．old	C．easy	D．new
20．A．finished	B．avoided	C．kept	D．stopped
21．A．serious	B．strict	C．honest	D．silly
22．A．modern	B．perfect	C．priceless	D．expensive
23．A．hiding	B．fixing	C．covering	D．throwing
24．A．confidence	B．joy	C．courage	D．warmth

18．Televisions have been necessary in most houses for a long time．Children are very fond of watching TV．Some parents are happy about that because it keeps their children from playing with and breaking things．
Watching TV can help your children learn about lots of things，such as music，other countries，and many other things．They will learn about what is good and what is bad．TV also provides children with up-to-date information about the outside world．
However，it's not right to say that watching TV doesn't have any bad effect on children．You can't let them watch TV as much as they want．Watching TV takes a lot of time．Children need to discover the world by themselves，not just from TV．Besides，children are growing and they need to move around and get lots of exercise．Sitting still and watching TV too much will make children become weaker physically．
Most children like to eat snacks while watching TV．That will make them put on weight．To make it worse，there may be too many ads and violent（暴力的）scenes on TV．These things，of course，are bad for children．
As parents，you should control the amount of TV that your children watch．You have to choose the right channels for them，and shouldn't let the TV be on all day．Turn it off right after their programmes end．Encourage them to take part in outdoor activities and do more things．Never put a TV in the bedroom，especially in your children's room!

Children and TV
Advantages	Children play with or（51）breakthings less often because of TV． TV makes it possible for children to learn about the world and it（52）provides the latest information for children．
Disadvantages	Children often （53）spenda lot of time watching TV． It's not good for children to discover the world from TV（54）insteadof by themselves． Watching TV too much does （55）harmto children's health． Some programmes are（56）badfor children's mind．
（57）advicefor paren	（58）controlthe amount of TV that the children watch and choose the right channels． Turn the TV off after their programmers are（59）over． Encourage children to take part in more outdoor（60）activities．

17．Lin Xiao，21，a student at Guangdong University，has a big family-her parents，a younger brother and two younger sisters．Lin took her role as the"big sister"seriously．When her first sister was born，Lin took turns with her mom holding the baby late into the night．"I almost did everything that was supposed to be a parent's job，but I felt proud of myself，"she said．
Not all of Lin's classmates shared her experiences because of the family planning policy （政策），The one-child policy has been carried out in China for about forty years．But the situation is about to change．A new policy made on October 29said all couples can now have two children．
The new policy is expected to help raise the population of China．Recently，China has been facing an aging population and labor shortages because of the low birth rate （比率）．
The two-child policy may also be the gift for every only child．Researchers found that growing up with a brother or sister can have good influence on one's mental （心理） health．
"Brothers and sisters do matter in unique ways．They give kids something that their parents don't．"Laura Walker，a professor from Beijing University，told China Daily．She noted that having a brother or a sister protects teenagers against loneliness，fear and so on．
Liu Fang，20，from Shenzhen University，has a 2-year-younger sister．When her sister disagreed with parents over choosing a college major，she helped her to communicate with her parents．"If necessary，I would always have her back，"said Liu．"The best part of having a sister is that you have a partner，friend and supporter throughout your life．"
But children with brothers or sisters also have to learn to understand and look after each other，said Laura．
46．How many children are there in Lin Xiao's family？Four/4．
47．How did Lin Xiao feel when she did what a parent should do？She felt proud of herself．
48．How long has China carried out the one-child policy？For about 40 years．
49．Why is China facing an aging population and labor shortages？Becuse ofthelowbirthrate．
50．What's the best part of having a sister according to Liu Fang？Thebestpartofhavingasisteristhatyouhaveapartner，friendandsupporterthroughoutyourlife．

16．

I fell in love with Yosemite National Park the first time I saw it，when I was 13．My parents took us there for （16）D．On the way out，I asked them to wait（17）C I ran up to E1Capitan，a huge rock of 3，300feet straight up．I touched that giant rock and knew I wanted to climb it．That has been my life's love ever since-（18）D the rocks and mountains of Yosemite．
About 15years ago，I started seeing a lot of （19）C，like plastic bags and empty boxes，around the area．I don't understand why travelers started respecting the place
（20）B and treated such a beautiful home-like place this way．
I tried picking up rubbish myself，but the job was too （21）A．I would spend an hour or two on the job，but sadly found the area in a mess all over again weeks later．Finally，I got so tired of it that I decided to change something．
As a rock-climbing guide，I knew （22）D about organizing any other big event．But in 2014，together with some climbers，I set a （23）A for a cleanup．On that day，more than 300people showed up．Over three days we collected about 6，000pounds of rubbish．It was amazing how much we could complete．I couldn't believe the（24）B
we made-the park looked clean!
I often hear people complain about their environment．If you are one of them，I would say the only way to change things is by （25）A instead of complaining．We need to teach by example．

16．A．eating	B．swimming	C．shopping	D．camping
17．A．unless	B．since	C．when	D．though
18．A．imagining	B．painting	C．describing	D．climbing
19．A．material	B．resources	C．waste	D．goods
20．A．more	B．less	C．most	D．best
21．A．hard	B．easy	C．interesting	D．dangerous
22．A．something	B．anything	C．everything	D．nothing
23．A．date	B．report	C．scene	D．standard
24．A．mistake	B．difference	C．invention	D．discussion
25．A．doing	B．thinking	C．speaking	D．watching

15．He needs ____hamburgers because he is very hungry．（　　）

试题分类