Many people have heard stories of the California gold rush during the 19^th century, when lots of people went there in search for gold. Panning (淘洗) for gold has a rich and interesting history. Nowadays some people continue to pan for gold in California. Although it cannot be regarded as a method for earning income, taking on gold-panning as a hobby can give you a feeling of being in the old west and get you out into nature.
The only tool that is required to pan for gold is a gold pan. You can use a regular old flat pan, but “officially” gold pans are quite cheap so you may as well buy one that is made for the task. Most sold pans come in either plastic or medal.
Once you have your pan you will want to start practicing your gold panning technique. Panning for gold works because gold is much heavier than most rocks. To pan for gold you add rock and dirt form the bottom of a stream to your pan and then gently let water flow through the pan. The lighter-weight rocks are slowly swept away while any gold will be left behind in the pan.
To start panning for gold, first you will need to find a good location. Try checking maps of your area and old history books to find location where there were gold mines in the past. Even though most of the gold have already been removed, there are likely to be small leftovers that you can find. Once you have found an area that looks promising, look for any small stream or river where you can try out panning for gold.
Panning for gold requires patience and it may be a long time before you hit anything of value. However, it is an enjoyable hobby and provides a great opportunity to get outdoors, so don’t give up too quickly.
【小题1】What is Paragraph 4 mainly about?

 All around the world, shoppers flock to Wal-Mart to buy everything．In Texas, they come for another reason: to see the wind turbine(涡轮机) , which supplies 5% of the store's electricity．It along with other facilities, such as exterior walls coated with heat-reflective paint, makes this Wal-Mart a green giant．

The laws of economics suggest that Wal-Mart, with 5, 200 stores worldwide, influences everything including the price of all kinds of goods．It throws its weight behind environmental responsibility, and the impact could be amazing．"One little change in product packaging could  save 1, 500 trees," says Wal-Mart CEO Lee Scott．"If everybody saves 1, 500 trees or 50 barrels of oil, at the end of the day you have made a huge difference．"

Scott wants Wal-Mart to do its part too．He has promised to cut the existing greenhouse-gas emissions （排放） over the next few years and promised to construct new stores that are more efficient．He wants Wal-Mart's fleet (车队) of more than 7, 000 trucks to get twice as many miles per gallon by 2015．Factories that show Wal-Mart they're cutting air pollution will get preferential treatment in the supply chain. Wal-Mart says it's working with consumer-product manufacturers to  reduce their packaging and will reward them if they do so．

Some people may doubt it is a bid to attract attention from Wal-Mart's controversial labor and health-insurance practices．But it's not just window dressing, because Wal-Mart sees profits in going green．Scott says, "This is a business philosophy, not a social philosophy．We don't go where we don't think there's a great interest in change．"

Like Bill Gates, who started his charitable foundation, Scott happens to be promoting Wal-Mart's image at a time when his company's reputation is declining．He acknowledges that he launched the plan partly to shield （保护，庇护） Wal-Mart from bad press about its contribution to global warming．" By doing what we're doing today, we avoid the headline risks that are going to come for people who did not do anything," he says．"At some point businesses will be held responsible for the actions they take．" Meanwhile, should Wal-Mart succeed at shrinking its environmental footprint and lowering prices for green products, both the planet and the company will profit．

1.We can infer from the passage that ______．

A. Lee Scott is Wal-Mart's CEO

B. there are 5, 200 stores in the world

C. Wal-Mart has a great influence on the world market

D. Wal-Mart has more than 7, 000 trucks all over the world

2.What does the underlined sentence "This is a business philosophy, not a social philosophy．" mean in the fourth paragraph?

A. Wal-Mart predicts huge profits in its green activity．

B. Wal-Mart's green activity is just window dressing．

C. Wal-Mart aims to solve its health-insurance practices．

D. Wal-Mart doesn't have any social responsibility at all．

3.What will Wal-Mart probably do in the future?

A．Reduce air pollution in its present stores．

B．Give favorable treatment to its consumers．

C．Ask the factories to reduce their packaging．

D．Demand the fleet of trucks to use more fuel than before．

4.What is the main idea of the last paragraph?

A．Provide the background of the green plan．

B．Stress the purpose of Wal-Mart's green plan．

C．Present the risk that Wal-Mart is facing nowadays．

D．Analyze the similarity between Bill Gates and Scott.

B
In ancient Japan, if you saved someone's life, they would make it their duty to spend the rest of their life serving you. Nowadays, if you rescue someone's story, he or she will feel the same kind of gratitude(感激).
It happens all the time. Someone in a group is telling a story and, just before their big point, BOOM! There's an interruption. Someone new joins the group, a waiter with a plate of biscuits comes over, or a baby starts crying. Suddenly everyone's attention turns to the new arrival, the food on the plate, or the "charming" little child. Nobody is aware of the interruption－except the speaker. They forget all about the fact that the speaker hasn't made his or her point.
Or you're all sitting around the living room and someone is telling a joke. Suddenly, just before their big punch line (妙语), little Johnny drops a dish or the phone tings. After the crash, everyone talks about little Johnny's carelessness. After the call, the subject turns to the upcoming marriage or medical operation of the caller. Nobody remembers the great punch line got unfinished－except the joke teller. When it's you entertaining everyone at a restaurant, have you ever noticed how you can almost set your clock by the waiter coming to take everyone's order just before your funny punch line?
Most joke and story tellers are too shy to say, after the interruption, "Now, as I was saying ..." Instead, they'll spend the rest of the evening feeling bad because of what they didn't get to finish. Here's where you come in. Rescue them with the technique I call "Lend a Helping Tongue. "
Watch the gratitude in the storyteller's eyes as he restarts where his story sank and he sails off again toward the center of attention. His expression and the appreciation of your consideration by the rest of the group are often rewarded enough. You are even more fortunate if you can rescue the story of someone who can hire you, promote you, buy from you, or otherwise lift your life. Big winners have excellent memories. When you do them favors like Lend a Helping Tongue, they'll find a way to pay you back.
45．Very often, a storyteller cannot make his point because_____.
A．people are more interested in food than his story
B．many guests bring their babies to the party
C．he is interrupted by something unexpected
D．his story is easily forgotten by the listeners
46．From Paragraph 3, we know that when someone is telling a joke, _________.
A．something bad will surely happen just before their punch line
B．the only person really interested in the joke is the joke teller
C．listeners' attention is often drawn to something else
D．the waiter knows when to take everyone's order
47．How can we help the joke and story tellers when they are interrupted?
A．By giving them a chance to finish.
B．By going on telling the story for them.
C．By comforting them to make them happy.
D．By teaching them some useful techniques.
48．What is the text mainly about?
A．We can win someone's heart by getting him back to his story.
B．People should learn how to take turns in a conversation.
C．Telling jokes will make you the center of attention.
D．It is impolite to interrupt someone's talk.

The following is a recent survey among teenagers:

Radio Most teenagers nowadays are not regular listeners to radio. They may occasionally tune in, but they do not try to listen to a program specifically. The main reason teenagers listen to the radio is for music, but now with online sites streaming music for free they do not bother, and users can choose the songs they want instead of listening to what the radio presenter/DJ chooses. Television Most teenagers watch television, but usually there are points in the year where they watch more than average. This is due to programs coming on in seasons, so they will watch a particular show at a certain time (as long as it lasts) but then they may watch no television for weeks. Teenagers are also watching less television because of services such as BBC iPlayer, which allows them to watch shows when they want. Whilst watching TV, adverts come on quite regularly (18 minutes of every hour) and teenagers do not want to watch these, so they switch to another channel, or do something else whilst the adverts run. Newspapers No teenager that I know of regularly reads a newspaper, as most do not have the time and cannot be bothered to read pages and pages of text while they could watch the news summarized on the Internet or on TV. Internet Every teenager has some access to the Internet, be it at school or home. Home use is mainly used for fun (such as social networking) whilst school (or library) use is for work. Most teenagers are heavily active on a combination of social networking sites. Facebook is the most common, with nearly everyone with an Internet connection registered and visiting >4 times a week. Facebook is popular as one can interact with friends on a wide scale. For searching the web, Google is the dominant figure, simply because it is well known and easy to use. Some teenagers make purchases on the Internet (on sites like eBay) but this is only used by a small percentage, as a credit card is required and most teenagers do not have credit cards. Many teenagers use YouTube to watch videos (usually anime which cannot be watched anywhere else) and some use it as a music player by having a video with the music they want to listen to playing in the background. Mobile Phones 99pc of teenagers have a mobile phone and most are quite capable phones. Usually, teenagers only use their phones for texting, calling. Features such as video messaging or video calling are not used—because they are expensive. Services such as instant messaging are used, but not by everyone. It usually depends whether the phone is Wi-Fi compatible, because otherwise it is very expensive to get Internet off the phone network. As most teenagers’ phones have Bluetooth support, and Bluetooth is free, they utilize this feature often. Mobile email is not used as teenagers have no need; they do not need to be connected to their inbox all the time as they don’t receive important emails.

阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。注意：每个空格只填一个单词，并请将答案写在答题纸上。
The family sphere (范围) used to be defined by its isolation from the public realm. There was the public male realm (领域) of "rational accomplishment" and cruel competition, and the private female and child-rearing sphere of home, intuition (直觉) and emotion. The private realm was supposed to be isolated from the realities of adult life. For both better and worse, television and other electronic media tend to break down the difference between those two worlds. The membrane around the family sphere is much more permeable (可渗透的). TV takes public events and transforms them into dramas that are played out in the privacy of our living rooms, kitchens and bedrooms.
Parents used to be the channel through which children learned about the outside world. They could decide what to tell their children and when to tell it to them. Since children learn to read in stages, books provide a kind of natural screening process, where adults can decide what to tell and not tell children of different reading abilities. Television destroyed the system that separated adult from child knowledge and separated information into year-by-year slices for children of different ages. Instead, it presents the same information directly to children of all ages, without going through adult filters.
So television presents a real challenge to adults. While a parent can read a newspaper without sharing it with children in the same room, television is accessible to everyone in that space. And unlike books, television doesn’t allow us to flip (翻转) through it and see what’s coming up. We may think we’re giving our children a lesson in science by having them watch the Challenger take off, and then suddenly they learn about death, disaster and adult mistakes.
Books allow adults to discuss privately what to tell or not tell children. This also allows parents to keep adult material secret from children and keep their secret keeping secret. Take that same material and put it on The Today Show and you have 800,000 children hearing the very things the adults are trying to keep from them. "Television takes our kids across the globe before parents give them permission to cross the street." 
More importantly, children gradually learn that adults are worried and anxious about being parents. Actually, television has also places families under a lot of stress.
How Television Changes Childhood?