1 . 网络已成为人们生活中必不可少的一部分, 由此而产生的青少年网瘾现象引起了人们的关注。假设你是李华，请你以学生会的名义写一篇倡议书，号召全校同学合理使用网络。            
内容包括：1. 网瘾现象;2. 网瘾的危害;3. 你的倡议。
注意：1. 词数不少于80字;
2. 开头已为你写好，不计入总词数，可适当增加内容，以使行文连贯。
Dear fellow students,

With the wide application of various digital gadgets, the Internet is finding its way into our daily lives.

_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Students’ Union

2 . Ways Your Cell Phone Affects Your Body and Mind

First, some good news. Your phone can keep you safer. A study found that 137 more lives were saved per 100,000 patients when people called 911 from a mobile phone rather than from a fixed one.     1    

Scanning your phone right before bed can cause sleep disorder. To avoid that, make a habit of not using your phone for at least 30 minutes before you close your eyes.

    2     People now spend more than five hours a day typing and tapping, and feel eyes achy. About 60 percent of Americans experience discomfort, such as dryness, eye tiredness, and even headaches. Try taking a break from screens every 20 minutes.

When you are awake, a single sound on your phone can signal the coming news. However, this can weaken your ability to focus on a task.     3     It can even encourage creative ideas when you are alone. When you’re bored, four different areas of your brain become active and work together to pull in thoughts and combine them in unique ways.

Memory suffers too.     4     Instead of relying on the instructions from your phone’s GPS, older adults choose the old way, which increases activity in a part of the brain important for memory. Taking pictures with your phone may also harm your memory.

It would be easy to avoid all these problems by simply putting down your phone. The problem: It isn’t so easy.     5     And researches have proved this real. Of course, there are many phone apps to help you control your phone addiction. Or you can just let the battery rundown and forget about it!

A．But there are plenty of worries too.

B．Your phone can do damage to your eyes.

C．Silence your phone or simply put it away can help.

D．Walking with your face in your phone can be dangerous.

E．People may feel painful when separated from their phones.

F．Your hand may feel painful when you hold your phone too long.

G．Using a map and trying to remember it may be better for your brain.

3 . Were We Happier Without Social Media?

Social media is now fully implanted in our daily lives. We spend an average of two hours a day sharing, liking, tweeting, and updating information on social media. Indeed, the wonderful digital platforms enrich our lives with information and entertainment.    1    

Social media and stress

    2    In fact, it might turn out an endless stream of stress. In 2015,researchers tried to discover if social media causes more stress than it relieves. In the survey, women were reported being more stressed than men. Twitter was found to be “a contributor to stress”, because it increased people’s awareness of pressure.

Social media and relationship

Finding people sharing your ideals online might be delightful.    3     It could happen, but, in reality, it’s your family, friends and teachers that bring you the true delight. But the time you spend on people on social media is greater than those you see in real life. On the platforms, the liquid relationships without real details don’t really translate into true connections in your real life.

Social media and entertainment

Social media may provide us with excitement, during which dopamine (多巴胺) would be released to keep us entertained. Entertainment has never been so easy with dopamine released so quickly, getting us addicted. For that excitement, we mortgage (抵押) a more meaningful and enjoyable life.    4    

Therefore, the answer to the question should be clear now. The feeling of being loved and being able to count on different people makes us happier. Social media sometimes just cheats us.    5    For the real happiness, we should maintain contact, talk face-to-face, listen to each other.

A．Thanks to it, we become happier.

B．People use social media to let off pressure

C．In return, it traps and takes away our attention.

D．However, were we happier without social media?

E．Moreover, we should say goodbye to social media.

F．Don’t take it for granted that it gives us constant joy.

G．Can they really end up accompanying you in your real life?

4 . Internet addiction is a common problem.     1     If you are concerned that you may be too dependent on the Internet, there are several strategies you can use to control your Internet usage. Removing the temptation (诱惑) to go online is one of them. Here are some tips to get you started.

    2     If your devices are on and within arm’s reach, you may find yourself mindlessly checking them during meal times and other social activities. Just turn off your device or at least put it on silent and place it somewhere out of sight.

Charge your devices in another room at night to prevent bedtime browsing (浏览). Bedtime browsing can impact your ability to fall asleep and stay asleep due to the blue light your smartphone emits.     3    

Remove social media apps from your phone. If you find yourself picking up your phone and going on the Internet every time you get a notification (通知), delete the social media apps on your phone. Make it a rule that you can only check these apps on your computer.     4    

Look at one website at a time instead of having multiple websites open.     5     This can help you to avoid going back and forth between multiple sites and wasting time.

Technological tools are meant to serve us, not the other way around. Take action right away to free yourself from Internet dependency and take control of your life.

A．Cut your home Wi-Fi access if it is really necessary.

B．It can be just as damaging as any other form of addiction.

C．So stopping bedtime browsing may help you to sleep better.

D．This may help prevent you from accessing them on and off all day.

E．Turn off your smartphone, iPad, and computer during social activities.

F．If you are on a website and it leads you to another one, close the old site.

G．Developing healthy habits can also help you to cut back on your internet use.

5 . Ashlee Thomas' struggles are just one example of Instagram's potential"toxic"effect on teen girls,as highlighted in he congressional(国会的) testimony(证词)of Frances Haugen on Friday.

"I believe Facebook's products harm children,encourage division and weaken our democracy, said Haugen, a 37-year-old former Facebook product manager who worked on civic integrity issues at the company.

Facebook's own internal research,cited by Haugen,showed"13.5%of teen girls on Instagram Instagram is owned by Facebook) say the platform makes thoughts of 'Suicide and Self Injury worse"and 17% say the platform makes" Eating Issues"such as anorexia(厌食症)worse.

Its research also claimed Facebook's platforms"make body image issues worse for l in 3 teen girls."

"The company's leadership knows how to make Facebook and Instagram safer but won't make the necessary changes because they have put their profits before people,"Haugen said during her opening remarks."Congressional action is needed. They wont solve this crisis without your help."

Facebook CEO Mark Zuckerberg took to the platform he built to defend the company against Haugen's allegations(指控),saying in a 1,300-word statement that the tech giant's research on its impact on children was being misrepresented.

"We care deeply about issues like safety, well-being and mental health,"Zuckerberg wrote.

He added, "Many of the claims don't make any sense.If we wanted to ignore research, why would we create an industry-leading research program to understand these important issues in the first place?"

In a statement, Facebook doubted the interpretation(解释) of the research and insisted th percentages are much lower.The company has also said it welcomes regulation.

Still, those familiar with the workings of the tech world say it will take much more to save teens.

"Their business model's putting kids into these kinds of loops of engagement,"said Tristan Harris, co-founder of the Center for Humane Technology."And that's what I’m really worried about...that there isn't some quick fix to this thing.It’s the intrinsic((固有的)nature of the product."

1. What issue does this article mainly talk about?

A．Facebook's development problems.

B．Children's poor eating habits.

C．Facebook's possible harm on its users.

D．Instagram's business model.

2. What does the underlined word"toxic"in the first paragraph most probably mean?

A．poisonous	B．Immediate
C．beneficial	D．dramatic

3. What is the main conflict between Frances Haugen and Mark Zuckerberg?

A．Whether there is a Facebook internal research.

B．Whether the result of the internal research is true.

C．Whether Facebook accepts regulation.

D．Whether Facebook cares about its users.

4. What is the best structure of this passage?

A．

B．

C．

D．