Recent research from the Pew Internet Project suggests that 90% of Americans aged from 12 to 17 use the Internet, and 51% of those teens use social networks. However, there are many possible problems with social networking sites and the teenagers who use them.

Apart from the social advantages, social networking sites can be used to record school research, develop artistic talents and experiment with other forms of subject creation. They provide a way to communicate with others who share the same interests and to get helpful advice on ongoing projects.
Along with these advantages come some dangers. For example, most social networking sites are open to all, especially MySpace, which is the most popular social network among teens in America. It means that they could be put in unpleasant and frightening situations.
A greater danger is that teens may become objects of the people with secret purposes. The secrecy of some social networking sites makes it easy for dangerous people to find young teens and invite them into dangerous conversations. It’s easy for them to pretend as teens and draw children into dangerous real-world communication as well. Then further hurt might be on its way.
Another danger is identity stealing, which can happen when teens share too much information about their names, dates of birth and locations.
Therefore, it’s very important to make sure teens are safe when they use social networks.
Many of the same rules that work for online chat work for these sites:
※Don’t use your real name.
※ Don’t give out personal information to people you don’t know. A last name and a town
are enough for a bad guy to find where you are.
※ Don’t believe that people are who they say to be.
※ Immediately end any communication that makes you uncomfortable and report it to a
parent.
Only if you are sure of your safety, can you enjoy the fun brought by social networking. Besides, trying to deal with all problems on your own can lead to terrible results. Remember, asking your parents or school officials for help doesn’t mean you are unable to do anything but wiser than many others.                                             
【小题1】How many dangers of using social networks are mentioned in the passage?

In England recently three foreign gentlemen came to a bus stop and waited. About five minutes later, the bus they wanted came along. They were just going to get on when suddenly there was a loud noise behind them. People rushed onto the bus and tried to push them out of the way. Someone shouted at them. The bus conductor came rushing down the stairs to see what all the trouble was about. The three foreigners seem all at sea and looked embarrassed (窘迫的). No one had told them about the British custom (习惯)of lining up for a bus that the first person who arrives at the bus stop is the first person to get on the bus .
Learning the language of a country isn't enough. If you want to have a pleasant visit, find out as much as possible about the manners and customs of your host country. You will probably be surprised just how different they can be from your own. A visitor to India would do well to remember that people there consider it impolite to use the left hand for passing food at table. The left hand is supposed to be used for washing yourself. Also in India, you might see a man shaking his head at another to show that he doesn't agree. But in many parts of India a shake of the head means agreement. Nodding your head when you are given a drink in Bulgaria will most probably leave you thirsty. In that country, you shake your head to mean 'yes'— a nod means ‘no’. At a meal in countries on the Arabic Peninsula, you will find that your glass is repeated refilled as soon as you drink up. If you think that you have had enough, you should take the cup or glasses in your hand and give it a little shake from side to side or place your hand over the top.
In Europe it’s quite usual to cross your legs when you are sitting talking to someone even at an important meeting. Doing this in Thailand, however, could bring about trouble. Also, you should try to avoid (避免)touching the head of an adult ——it's just not done in Thailand .
【小题1】 The British people tried to push the three gentlemen out of the way, because the gentlemen _________.

Once upon a time there lived a woman who had a bad temper(脾气). She  1 at everyone around her. For most of her life she believed the anger inside her was  2  else’s fault(过错).
She went to see a wise monk(高僧) to ask for  3  . The monk told her to take a large pot（罐子) from his kitchen, fill it with  4 , and stand outside on the sidewalk in front of his house. “It’s hot outside,” the monk said to her “When a person  5 , you must give him or her a glass of water. Do this until there is no 6  left inside you.”  7  she stood outside with a water pot and served water to walkers every day for the next several weeks.
Every morning she asked   8  if there was any anger inside her. And every morning the answer was, “yes.” So she continued  9 water. Until one afternoon when a man walked up, took the water pot out of her hand and drank the water up, and then  10 it onto the ground as he went on his way.
The woman was very  11 . Unable to control herself, she  12  the pot and threw it at the rude man. The pot broke into pieces over the back of his head and he fell to the ground, bleeding.
As the woman calmed down, she realized the mistake of what she had made and began to cry. She called 911 and  13  what had happened. A moment later an ambulance(救护车) and two police cars arrived and took the man away. Then one of the police officers walked over to the woman, who was  14 crying, and said, “ The city owes(欠) you a big ‘thank you.’ That man has been  15 our wanted list for over a year now. He is an important suspect in many murder cases and robberies.”

In the 13^th century, the famous Indian traveller, Marco Polo, travelled a long way to China. He saw many wonderful things. One of the things he discovered was that Chinese used paper money. In western countries, people did not use paper money until the 15^th century. However, people in China began to use paper money in the 7^th century.
A Chinese man called Cai Lun invented paper almost 2,000 years ago. He made it from wood. He took the wood from trees and made it into paper. He then put these pieces of paper together and made them into a book.
Now paper still comes from trees. We use a lot of paper every day. If we keep on wasting so much paper, there will not be any trees left on the earth. If there are no trees, there will be no paper. Every day, people throw away about 2,800 tons of paper in our city. It takes 17 trees to make one ton of paper. This means that we are cutting nearly 48,000 trees every day. Since it takes more than 10 years for a tree to grow, we must start using less paper now. If we don’t, we will not have enough time to grow more trees to take the place of those we use for paper.
So how can we save paper? We can use both sides of every piece of paper, especially when we are making notes. We can also use cotton handkerchiefs（手帕） and paper ones. When we go shopping, we can use fewer paper bags. If the shop assistant does give us a paper bag, we can save it and refuse (拒绝) it later.
Everyone can help to save paper. If we all think carefully, we can help protect trees. But we should do it now, before it is too late.
【小题1】When he was in China, Marco Polo __________ .

One day, a farmer was walking along a road with his son Thomas. The father said, "Look! There's a horseshoe. Pick it up and put it in your bag." Thomas said, 'It isn't worth the trouble." His father said nothing but picked it up himself. When they got to a nearby town, they lad a rest. There the farmer sold the horseshoe and with the few pennies he bought some cherries.
The father and the son continued their way. The sun was well up in the sky, and there wasn't a house or even a tree where they could have a rest. Thomas felt too thirsty to walk on. At this time, his father dropped a cherry on the ground and Thomas picked it up quickly and ate it. After a while, his father dropped another cherry and once again, his son lost some time in picking it up and putting it in his mouth.
And so they went on. The old farmer dropped the cherries and the son picked them up. When Thomas had eaten up all the cherries, his father said to him, "My dear son, if you had bent down earlier to pick up that horseshoe. it would not have been necessary for you to bend so many times for the cherries. Always remember the lesson that anyone who does not worry about the little things will find that he cannot do the great things.
【小题1】Who picked up the horseshoe at last?