假定你是高三学生李华，你所在的学校上周末举办了防网络沉迷活动，请你给你在美国的笔友Susan写一封邮件介绍这次活动，并给出合理使用网络和移动设备的建议。
注意:1.词数100左右；2.可适当增加细节，使行文连贯。
参考词汇:网络游戏 online games 移动设备 mobile devices
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
假如英语课上老师要求同桌之间交换修改作文，请你修改你同桌的以下作文，文中共有10 处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加，删除或修改。
增加: 在缺词处加一个漏字符号(/\),并在其下面写出该加的词。
删除: 把多余的词用斜线(\) 划掉。
修改: 在错的词下划一横线，并在该词下面写出修改后的词。
注意:1.每处错误及其修改均仅限一词:
2.只允许修改10处，多者(从第11处起) 不计分。:
Last Saturday our class went hiking in a countryside. We meet at our school gate and set off at 8:00 am. On the way, we were singing and laughing happily while a girl suddenly fell into a deep hole. She felt so frightening and even burst into tears. One of my classmate found a long rope and we finally got him out. Fortunately , she didn’t suffer seriously injuries, but it seemed that her ankle slightly twisted. We managed to sending her to the nearest hospital. It is an experience we’ll never forget it, though we didn’t enjoy ourselves very much that day.
On Thanksgiving weekend, the family gathered for a meal in their three-storey house. After ______ , Charlotte, her mum and little brother went down to the basement to rest. Charlotte’s dad headed for the garage to ______ his truck.
Around 8 p.m., Charlotte decided to _______ her dad. She went upstairs and walked through the kitchen. When she _______ the side door to the garage, black smoke blew into the kitchen. She could barely ______ her father lying on his back, ______ under the truck. He’d raised the truck on a jack(千斤顶) and ______ the front tire. The truck had slipped _____ the jack.
Charlotte ran to the ______ of the truck and struggled to lift it. Her dad was still ______ , and he yelled, “One more try!” She tried ______ and was able to tip the truck backward. She grabbed her dad by the shirt with both hands and ______ him from under the truck to a safe place. Then she ran back to the _____, which had burst into flames. It was on fire! She was afraid the truck was going to ______ so she climbed into the truck, ______ the key, and pressed the gas pedal( 踏板). The truck ______ rolled out, the metal wheel rubbing roughly and loudly against the ground. Charlotte ______ the truck safely outside the garage and then rushed down to the basement. “There’s a ______. Everybody, get out!” She shouted to her family members. They _____ her out of the back basement door quickly.
The garage was destroyed, but the family _____.
1.A. dinner B. fun C. weekend D. school
2.A. clean B. drive C. fix D. fetch
3.A. look for B. find out C. stare at D. check on
4.A. opened B. closed C. broke D. repaired
5.A. pick up B. make out C. rely on D. see through
6.A. relaxed B. tired C. trapped D. hidden
7.A. placed B. made C. carried D. removed
8.A. off B. into C. with D. between
9.A. back B. front C. inside D. door
10.A. injured B. sleepy C. conscious D. desperate
11.A. yet B. still C. too D. again
12.A. dragged B. hugged C. caught D. held
13.A. kitchen B. bedroom C. basement D. garage
14.A. stop B. explode C. speed D. crash
15.A. locked B. left C. turned D. found
16.A. slowly B. suddenly C. smoothly D. safely
17.A. stopped B. pushed C. drove D. lifted
18.A. party B. meal C. chance D. fire
19.A. led B. followed C. pulled D. showed
20.A. broke B. gathered C. survived D. separated
Last week the electricity in my flat went out.1. My typical evening is spent watching TV and scrolling (滚动) through social media. Tonight this wasn’t possible. My roommate and I weren’t prepared with candles and matches. We just rely on electricity.
So for me it was an early night, 2. That night, losing our electricity felt like losing a basic necessity, as basic as running water. But really, electricity is a luxury that we’ve grown to take for granted. I use electricity all the time, even when it’s not really necessary.
3. And as I’m writing this, I have my lights on, even in the middle of the day when I don’t really need them.
4.It contributes to global warming. It is harming our environment and we need to do what we can to stop it. Not only that, but if we continue to use the same large amount of energy, we will soon run out of it.
How would we survive in a world without electricity? Our daily lives go around it. We wouldn’t be able to function. 5.So, shouldn’t we start preparing for it now? Cutting down on our use of electricity would save energy resources so that they could last for longer. And if everyone does it, we can make a big difference.
A. Yet we know one day we will run out of it.
B. Our over-use of electricity is a big problem.
C. This left me in complete darkness the whole night.
D. It is a real problem to cut down on the use of electricity.
E. I know for sure I could cut down on my use of electricity.
F. I couldn’t help but think, do we rely too much on electricity?
G. I turn on the TV in the background even when Tm not watching it.
Imagine you’re standing in line to buy an after-school snack at a store. You step up to the counter and the cashier scans your food. Next, you have to pay. But instead of scanning a QR code (二维码) with your smartphone, you just hold out your hand so the cashier can scan your fingerprint. Or, a camera scans your face, your eyes or even your ear.
Now, this type of technology might not be far away. As technology companies move away from the traditional password, biometric(生物识别的) security, which includes fingerprint, face and voice ID, is becoming increasingly popular.
In 2013, Apple introduced the iPhone 5s, one of the first smartphones with a fingerprint scanner. Since then, using one’s fingerprint to unlock a phone and make mobile payments has become commonplace, bringing convenience to our lives. And since last year, Samsung has featured eye-scanning technology in its top smartphones, while Apple’s new iPhone X can even scan a user’s face. But despite its popularity, experts warn that biometrics might not be as secure as we’d imagined. “Biometrics are ideally good, but in practice, not so much” said John Michener, a biometrics expert.
When introducing the new iPhone’s Face ID feature, Phil Schiller, Apple’s senior vice president, said, “The chance that a random person in the population could look at your iPhone X and unlock it with their face is about one in a million.” But it’s already been done. In a video posted on community website Reddi, two brothers showed how they were each able to unlock the same iPhone X using their own face. And they aren’t even twins.
“We may expect too much from biometrics,” Anil Jain, a computer science professor at Michigan State University, told CBS News. “No security systems are perfect.”
Earlier this year, Jain found a way to trick biometric security. Using a printed copy of a thumbprint, she was able to unlock a dead person’s smartphone for police, according to tech website Splinter. “It’s good to see biometrics being used more,” Jain told CBS News, “because it adds another factors for security. But using multiple security measures is the best defense.”
1.What is the latest technology to unlock a smartphone according to the article?
A. QR code scanning. B. Face scanning. C. Fingerprint scanning. D. Eye scanning.
2.What’s a major problem of the iPhone X’s Face ID system?
A. It takes too long to unlock the phone.
B. It often fails to recognize its owner’s face.
C. Face data could be used for other purposes.
D. Different faces could be used to unlock the same phone.
3.What does Anil Jain think of biometric security?
A. It’s as secure as traditional measures.
B. It has caused much trouble for police.
C. It should be used with other security measures.
D. It is perfect without any room for improvement.
4.The author wrote this article mainly to ______.
A. describe the popularity of biometrics
B. show how biometrics has changed our lives
C. point out various problems with biometrics
D. discuss the security problems of biometrics
Food blogs, celebrities, and nutritionists all advocate the benefits of eating organic (有机的) fruits and vegetables. But a new study published in Science Advances paints a more complex picture. While organic produce is likely slightly healthier to eat and, in some ways, more sustainable to grow, there are also downsides.
Organic fruits and vegetables typically cost more than conventional ones. To get a certificate as organic, farmers must meet specific criteria, including growing produce without the use of genetic engineering and chemical inputs. Without these methods, the growing process typically requires more labor, time, and money, a cost that is passed down to consumers.
It’s true that in many ways, organic is more sustainable than conventional farming. But when it comes to environmental concerns such as greenhouse gas output and water loss, the comparison gets complex. Organic farms produce less greenhouse gas output per acre. However, because they are barred from using genetic engineering, pesticides (杀虫剂), and other methods that increase efficiency (效率), organic farms also produce an estimated 19% to 25% less yield than conventional farms. While there isn’t a whole lot research on the topic, the few studies that do exist suggest green gas output and water loss might actually be higher on organic farms, on a per unit basis, says study author Verena Seurfert.
In addition, while organic produce is likely more nutritious than conventional fruit and vegetables, there’s not a lot of evidence to support the claim that these often slight differences influence consumer health. The same is true for pesticide remainder. In developed countries, where pesticide use is tightly regulated, there’s no scientific consensus on how these often slight differences influence human health.
Still, Seurfert stresses that if you can afford to eat organic, you should do so. Organic farms provide safer work environments for workers, plus they support great biodiversity. The real takeaway from her study is not that organic is bad but that the practice needs more studies to increase yield without lowering sustainability.
But if you can’t afford to buy organic produce, don’t stress too much, particularly from a nutritional perspective.
1.What does the underlined word “downsides” in Paragraph 1 most probably mean?
A. Dangers. B. Drawbacks. C. Benefits. D. Differences.
2.Which key factor makes it hard to compare organic farming and conventional farming when it comes to environmental concerns?
A. The yield. B. The price. C. The water loss. D. The labor.
3.Which of the following will the author most probably agree with?
A. Farmers, work environment should be improved.
B. Organic produce should be made more efficiently.
C. It isn’t wise for consumers to buy organic products.
D. Pesticide remainder does no harm to people’s health.
4.In the author’s opinion, why should we support organic produce?
A. It’s environmentally friendly. B. It’s more nutritious.
C. It helps keep the variety of plants. D. It’s safer for consumers.
