邮件的开头和结尾已为你写好。
• go to grandparents' house
• attach Fu to the front door
• talk about the past year
• make jiaozi
• watch fireworks
•...
Dear Eric,
I am glad that you are interested in Chinese Spring Festival. I will share my experiences during Spring Festival with you.
I hope you will come to China someday and experience Spring Festival in person. I am looking forward to your reply.
Yours,
Li Hua
Why do you feel encouraged when your teacher gives you a smile? How do you know your mother is angry when she frowns(皱眉)? In both cases, the person is telling us something not with words, but with facial expressions.
Facial expressions are one or more movements on a person’s face, such as frowning, raising one’s eyebrows(眉毛)，and nose and lip(嘴唇) movements. They express people’s feelings.
Scientists at Oxford University have shown that humans have 80 muscles(肌肉) on their faces. These muscles can create more than 7, 000 facial expressions. However , there are six main kinds of facial expressions that are common in all cultures: happiness, sadness, surprise, fear, anger and disgust(厌恶).
Facial expressions are very important to communication. One study at UCLA, in the US, showed that in most conversations, over 93 percent of the communicating is done without speaking.
If people can read facial expressions, they may be better at knowing what other people are feeling, so they can understand them better. Someone who does not enjoy a certain type of food usually will make a face when he/she sees or tastes it. A frown means worry or anger. Raised eyebrows and open eyes show surprise.
However, there are some taboos(禁忌) for reading people’s facial expressions. For example, it is not a good idea to stare at someone for a long time while reading his or her facial expressions. They may think you are rude.
1. What are facial expressions?（不多于 15 个单词）2. How many facial expressions can our face muscles create?（不多于 5 个单词）
3. Why are facial expressions important?（不多于 15 个单词）
4. What may a person do when she/he feels surprised?（不多于 10 个单词）
5. What is the passage mainly about?（不多于 5 个单词）
3 . You spend a third of your life asleep, a certain part of which involves dreaming. But most often, you don’t remember any of your dreams.
While the exact reason of why we can hardly recall our dreams is not fully known, scientists have gotten some insight into memory processes during sleep, leading to several ideas that may explain our forgetfulness.
You are awake, but is your hippocampus(海马体) awake? When we fall asleep, not all the brain’s regions go offline at the same time. Researchers have found one of the last regions to go to sleep is the hippocampus, a structure in brain that is important for moving information from short-term memory into long-term memory.
“If the hippocampus is the last to go to sleep, it could very well be the last to wake up,” said Thomas Andrillon, a neuroscientist at Monash University in Melbourne, Australia. “So, you could have this window where you wake up with a dream in your short-term memory, but since the hippocampus is not fully awake yet, your brain is not able to keep that memory,” Andrillon told Live Science.
While this might explain why dream memories are so fleeting, it doesn’t mean that your hippocampus has been inactive throughout the night. In fact, this region is quite active during sleep, and appears to be storing and caring for existing memories to strengthen them, instead of listening for incoming new experiences.
Sometimes your dreams are just not memorable? Do you remember what you were thinking about this morning when brushing your teeth? Our minds wander(游离) all the time, but we get rid of most of those thoughts as unimportant information. Dreams, especially ordinary ones, may be just like daydreaming thoughts and believed by the brain to be too useless to remember. But dreams that are more vivid, emotional and coherent(连贯的) seem to be better remembered—perhaps because they cause more awakening, and their organized story makes them easier to store.
If you are interested in improving your dream recall, there are a few tricks to try. One is drinking water before bed, because it will make you wake up at night to use the bathroom. These middle-of-the-night awakenings are frequently accompanied by dream recall. Repeatedly reminding yourself that you want to remember your dreams may increase your chances, and so does keeping a dream journal, some studies have suggested. Upon waking up, hang on to that fragile(脆弱的) dream memory: keep your eyes closed, stay still and replay the dream memory, until your hippocampus catches up and properly stores the memory.
1. What can we learn about dreams from the passage?| A．Dreaming means processing memory during sleeping. |
| B．Dreams come from your hippocampus. |
| C．Dreams are sometimes useless for us to remember. |
| D．We need special trainings to recall our dreams. |
| A．you are forgetful and poor in remembering things |
| B．your dreams are vivid, emotional and coherent |
| C．your hippocampus is active in receiving new information |
| D．your brain needs to start up to move dreams into long-term memory |
| A．Inactive. | B．Short-lived. |
| C．Significant. | D．Slight. |
| A．Improve the ability of your hippocampus to catch up information. |
| B．Keep reminding yourself of the need to remember your dreams. |
| C．Record what you can remember in your dreams upon awakening. |
| D．Think back on the things in your dreams directly after you wake up. |
| A．To tell the importance of dreams. |
| B．To explain our forgetfulness in dreams. |
| C．To present some methods to recall dreams. |
| D．To analyze how our brain deal with information. |
4 . One Mother to Another
On Wednesday evening, our daughter, who was at a boarding school over 200 kilometers away, told us that she had lost her phone when she took part in an activity off campus. We realized that we had little chance of finding it.
The next morning, my phone beeped (哔哔响) loudly. A kind voice announced that she had something that belonged to my daughter. I
After contacting the people I know who lived near the school, I was out of
I gave them directions and they
We had thought that the chance of getting back the phone was
| A．suggested | B．reported | C．explained | D．argued |
| A．date | B．luck | C．work | D．control |
| A．pick up | B．carry out | C．hand in | D．give away |
| A．find | B．show | C．miss | D．take |
| A．regret | B．surprise | C．amusement | D．disappointment |
| A．especially | B．certainly | C．definitely | D．probably |
| A．conducted | B．arranged | C．delivered | D．identified |
| A．doubts | B．interests | C．predicts | D．worries |
| A．free | B．slim | C．hard | D．fair |
| A．tell | B．face | C．mean | D．join |
5 . You're never too young to make an impact on your community.
Members of Gen Z are exceptionally creative,cause-oriented,and hyper-aware of the world around them,making them perfectly ready to help handle the world's problems through volunteering.
If you want to make a difference in your community, be a part of something bigger than yourself, or just need to earn some required volunteer hours, then this is the place to start. Here are a few organizations of Gen Z with volunteer opportunities for teens!
Habitat for Humanity
Everyone deserves to have a place they call home. By volunteering with Habitat for Humanity, you can play a role in building up your community. Their Habitat Youth Programs accept volunteers between the ages of 5 and 40 for everything from home construction to affordable housing advocacy.
Meals on Wheels
For those teens who just got their licenses and love any reason to get behind the wheel, here's a volunteer opportunity that 'll make driving worthwhile. Meals on Wheels is on a mission to meet the nutritional and social needs of seniors. 225 million meals have been delivered so far-connect with your local provider to find out how you can get involved.
Key Club
As the oldest service program for high schoolers, the Key Club has quite a history of helping teens get involved in volunteering. Because clubs are student-led, you get a direct say in the kinds of service projects you want to do.Chances are, there's already a chapter in your school, but if not, you can try taking the lead in one.
Best Buddies
Volunteer with Best Buddies to help end the social,physical,and economic isolation of 200 million people with intellectual and developmental disabilities-and you'll make some new pals in the process! Join a school chapter (or start your own) to use friendship as a tool for inclusivity in your community.
And don't worry. Even if you can't volunteer physically, there are also tons of online volunteer Opportunities available! Find out more about joining a worthwhile volunteer organizations at www.Gen Z.org.
1. If you want to help people with disabilities, yon can join| A．Habitat for Humanity |
| B．Meals on Wheels |
| C．Key Club |
| D．Best Buddies |
| A．send meals to the elderly |
| B．make nutritional meals |
| C．drive the seniors around |
| D．teach the seniors to drive |
| A．'A part of a book. |
| B．A branch of a club. |
| C．A period of life. |
| D．An office on campus. |
| A．get more people to volunteer |
| B．teach teens to he more creative |
| C．promote awareness of world affairs |
| D．instruct teens to earn volunteer hours |
Keeping a travel journal is one of the best
Douban is a Chinese social networking platform whose users are mostly young people. Recently, a Douban discussion group
8 . Is Managing Kids' Screen Time a Good Idea?
Screen time is a big topic of conversation in today's households, particularly during the pandemic when online education hours have multiplied for many students.
If parents believe they can manage a child's screen time through adolescence, they are not only fooling themselves but also inviting relationship trouble with their teens. It is a myth to think that parents can or should manage their kids' screen time through authoritarian restrictions, even during elementary school.
To be clear, this article is not suggesting that families never use apps or trackers, or that there should be no restrictions on screen time.
| A．Of course, there are websites that are unhealthy for kids to access. |
| B．The alternative is to involve children in decisions that govern screen time. |
| C．However, every family needs a family media plan between family members. |
| D．The goal is to see, hear, feel, and understand how children view screen time. |
| E．To manage children's screen time, parents have invested in apps and trackers. |
| F．To get children involved, parents should trust and develop kids' self-awareness. |
| G．What it is suggesting is that parents look at managing screen time in a different way. |
9 . Alzheimer's AI
An estimated 5.7 million people in the U.S. have Alzheimer's disease-the most common type of dementia(痴呆）－and that number is expected to more than double by 2050. Early diagnosis is crucial for patients to benefit from the few therapies available. But no scans can deliver a conclusive diagnosis while a person is alive; instead doctors have to conduct numerous and complicated clinical and neuropsychological tests.So there is growing interest in developing artificial intelligence to identify Alzheimer's based on brain imaging.
Researchers at the University of California,San Francisco, have now successfully trained an AI algorithm(算法）to recognize one of the early signs of Alzheimer's-a reduction in the brain's glucose（葡萄糖）consumption-in positron emission tomography (PET) imaging.
The algorithm accurately predicted an eventual Alzheimer's diagnosis in nearly all the test cases, according to the study. In PET imaging, a very small amount of a radioactive compound are injected into the body, producing three-dimensional images of metabolism(新陈代谢）,circulation and other cellular activities. PET is well suited for an AI diagnostic tool because Alzheimer's leads to subtle changes in the brain's metabolism that begin years before neural(神经的） tissue starts to go downhill, says study co-author Jae Ho Sohn,a radiologist at UCSF. These changes are "very hard for radiologists to pick up,"he notes.
The algorithm was trained and tested on 2,100 PET brain images from about 1,000 people 55 years and older. The images came from a 12-year study that tracked people who would ultimately be diagnosed with Alzheimer's, as well as those with mild memory declines and healthy control participants. The algorithm was trained on 90 percent of the data and tested on the remaining 10 percent. It was then retested on a second, independent data set from 40 patients monitored for 10 years. The algorithm was highly sensitive and was able to recognize 81 percent of the patients in the first test group and 100 percent in the second who would be diagnosed with Alzheimer's six years later, on average. The findings were published in February in Radiology.
The algorithm is based on "deep learning ,a machine-learning technique that uses artificial neural networks programmed to learn from examples. "This is one of the first promising,preliminary(初步的） applications of deep learning to the diagnosis of Alzheimer's," says Christian Salvatore, a physicist at Italy's National Research Council, who was not involved in the study. “The model performs very well when identifying patients with mild or late diagnoses", he says, “but catching it in the earliest stages remains one of the most critical open issues in this field."
1. People are increasingly interested in using AI to identify Alzheimer's because______| A．the number of people suffering from dementia is more than doubling |
| B．diagnostic methods that are both reliable and convenient are in need |
| C．there are only a limited number of effective therapies for the patients |
| D．diagnosing Alzheimer's disease through AI is still an unexplored area |
| A．It recognizes the worsening of the neural tissue. |
| B．It reduces the glucose consumption in the brain. |
| C．It changes the pattern of the brain's metabolism. |
| D．It photographs various kinds of cellular activities. |
| A．90% of the people in the study were trained on the algorithm |
| B．the participants in the study consist of people both young and old |
| C．81% of the people in the first test group were diagnosed with Alzheimer's |
| D．the algorithm managed to recognize all the patients in the second test group |
| A．The algorithm serves as a promising treatment of Alzheimer's. |
| B．Deep learning has been widely applied in diagnosing Alzheimer's. |
| C．To detect Alzheimer's in its earliest stages calls for more exploration. |
| D．Whether to use the model to detect Alzheimer's remains a critical issue. |
10 . 
At age 12, Keegan Sobilo of New Baltimore carefully tucks his legs and arms into a fire suit, pulls on a helmet and climbs into a race car that exceeds 80 mph. He has been doing this since age 8.
“ At first, I was scared to death. I was like, 'Let's do bowling or swimming. ' It's still very scary.But he knows what he's doing. Your heart goes out on that track every time he goes out there," said his mother Hillary Sobilo.
＂The sixth-grader always wears pajamas to the track every night and takes them off when he puts his race clothes on. He's been doing that for the last four years. That's his trademark,” said Tim Phillips, his crew chief. The first time he wore his train pajamas to the track, Keegan went from last place to ninth place. He decided they brought luck. Since then, he has won a series of championships.
Passion for cars runs in the family. Keegan's father is a design mechanic at Fiat Chrysler Automobiles. He knows what it means to have seats and roll cages built to fit his son's body."What I see in Keegan is passion, like how I feel about car restoration. But for him, everything has to align itself. I tell my son you have to be the perfect package. Winning races every weekend is not the only key. More importantly, you have to have the right name, you have to look the correct way, speak the correct way, and act the correct way. Then the rest of it is really luck, like the stock market. If you don't put yourself out there,you'll never hit it big."
While Keegan's classmates play basketball and volleyball,Keegan is at the Birch Run track-practicing, qualifying and racing until 10 p.m. or 2 a.m. While many children spend time playing video games, Keegan runs race simulation training with his joystick after school.
＂The kid is cool.It was like having a grandson. We showed respect to each other. And he takes it very seriously," said competitor Mike Todd, 69 , of Galesburg, Michigan." He's an older soul in a young man's body. I'd like to see him make it big. He's got the willpower."
1. Keegan enjoys ______| A．swimming |
| B．racing cars |
| C．bowling |
| D．playing games |
| A．Victory. |
| B．Safety. |
| C．Good qualities. |
| D．Real luck. |
| A．Keegan spends a lot of time practicing |
| B．the train pajamas bring Keegan success |
| C．Keegan's mother worries about his studies |
| D．Keegan picked up the hobby at the age of 4 |
