As we all know, the Internet has become part of teenagers(青少年)       . A new reporter on 3,375 students aged from 10 to 18 in seven Chinese cities found that 38 percent of them used the Internet very       .
Most of them get useful information and use the Internet to help in their studies, but some are not using it in a        way .Many are playing online games too much.       even visit websites (網(wǎng)站)they should not look at. A teacher from Yucai Middle School says that bad things can happen if young people       too much time on the Internet. She had a student who used to be (曾經)good at school.     then he started visiting unhealthy websites. He went mad（變得瘋狂）,cheated（欺騙）a girl and was taken away by the police.
In order to help young people use the Internet       a good way, a textbook on good Internet behavior(行為) has started to be used in some middle schools this term. The book uses real examples to       students about good ways of using the Internet. The book gives useful advice such as to read news or to find helpful     to study. Teachers and parents all think the book is very good.
The book will be a guide (向導) for teens to use the Internet. We believe it will keep students away from bad websites, and teach students       to be a good person in the online world.

What’s your dream vacation? Watching wildlife in Kenya? Boating down the Amazon? Sunbathing in Malaysia? New chances are opening up all the time to visit the world. So we visit travel companies, compare prices, and pay our money.
We know what our vacation costs us. But do we know what it might cost someone else? It’s true that many poorer countries now depend on tourism for foreign income. Unfortunately, though, tourism often harms the local(本地的) people more than it helps them.
It might cost their homes and lands. In Myanmar, 5,200 people were forced to leave their homes among the pagodas(佛塔) in Bagan so that tourists could visit the pagodas.
Tourism might also cost the local people their jobs and dignity(尊嚴). Local workers often find only low-paying jobs in the tourist industry. And most of the money do not help the local economy（經濟）. Instead, money return to the tour operators in richer countries, When the Maasai people in Tanzania were driven from their lands, some moved to poor places of the city. Others now make a little money selling things or acting for photos.
Problems like these were noticed more than 20 years ago. But now tour operators and local governments are working together to begin correcting them. Tourists, too, are putting on the pressure.     
The result is “ethical（合乎職業(yè)道德的）tourism”. Ethical tourism has people at its heart. New international agreements and rules can help protect the people’s lands, homes, economies and cultures. The beginnings are small, though, and the problems are complex(復雜的).
But take heart. The good news is that everyone, including us, can play a part to help the local people in the places we visit. Tour operators and companies can help by making sure that local people work in good conditions and earn the money they should get.
They can make it a point to use only locally owned hotel, restaurants and guide services. They can share some money to help the local economy. And they can help the local people plan and manage tourism.
What can tourists do? First, we can ask tour companies to provide information about the conditions of local people. We can then make our choices and tell them why. And while we’re abroad, we can:
Buy local foods and products.
Pay a fair price for goods and services and not bargain for the cheapest price.
Ask before taking photographs of people.
They are not just part of the scenery!
Let’s enjoy our vacation and make sure others do, too.
【小題1】Which of the following is not mentioned?