阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

    You may not know a lot of people when you start high school. Even if you know some new students, you still feel nervous that you don't know any upperclassmen (高年级学生) and teachers. How are you going to make friends among this sea of unknown faces?

    Most high schools welcome new students before school actually starts. These are helpful not only because you learn your way around the buildings and get to meet some of your teachers, but also because you get to meet new students. That way, when you show up on your first day of school, you may already recognize a few familiar faces.

    When you talk to people, you'll probably find that a lot of them are feeling just like you. They're all new to the school and don't know what to expect. Talking about a common concern with your classmates can help you develop friendships.

    The work in high school is something freshmen are probably worried about. The work in high school builds on what you learned in middle school, giving you a more advanced knowledge of many subjects. So you may find you have more work to do or that it's a bit more challenging (有挑战性的). If you ever find your work too difficult, teachers can give you extra help.

    High school also has more activities after class than middle school, such as clubs, music and theater groups and sports teams. This is a good time to explore your interests and try new things.

    Middle school taught you the basics of academics, time management, and social skills while providing you with a little extra support and guidance. High school gives you the chance to learn how to be more independent (独立的) and responsible (有责任的).

    Swiss researchers said Monday they have developed a wireless camera system to monitor vital signs in premature babies, a move that could replace uncomfortable and highly inaccurate skin sensors (传感器) which produce false alarms in up to 90 percent of cases, mainly set off by the baby's movement.

    “This is a cause of discomfort for the babies, because we have to check on them every time,” said Jean-Claude Fauchere, a doctor at University Hospital Zurich's newborn clinic.

    His hospital is preparing to begin tests of a new, contactless system created by researchers at the EPFL polytechnical university in Lausanne and at the Swiss Center for Electronics and Microtechnology.

    The system designed in Switzerland should allow premature babies kept warm in incubators (恒温箱) to be medically monitored using highly sensitive cameras that detect the newborn's pulse by analyzing its skin color, which changes so slightly every time its heart beats.

    “Breathing is monitored by measuring movements of its chest and shoulders. At night, infrared (红外线的) cameras take over, and monitoring can be carried out non-stop,” the statement said.

    The visual system was designed by CSEM researchers, who chose cameras sensitive enough to detect minute changes in skin color, while the EPFL researchers designed algorithms (运算程序) to process the data in real time.

    “We ran an early study on adults, where we looked at a specific part of skin on their foreheads,” EPFL doctoral student Sibylle Fallet said. “With our algorithms we can track this area when the person moves, and use tiny changes in their color to determine the pulse,” she said. “The tests showed that the cameras produced practically the same results as conventional sensors.”

    Once the system has been widely tested on premature babies, it could one day replace skin sensors altogether, the schools said.

    A story posted by The New York Post Monday tells the tale of Katrina Holte, a Hillsboro woman who quit her job to cosplay a 1950s housewife.

    Let me start by expressing admiration to Holte for using her 2019 freedoms to follow her 1950s dreams. Everyone should be so lucky as to get to decide what they wear and how they spend their time. That's the future our foremothers fought for.

    But as much fun as I am sure she is having living a vintage (复古的) life, which literally includes watching shows like "I Love Lucy" and listening to vinyl recordings (刻录碟片), I think it's important to remember that being a 1950s housewife was actually totally awful, and something our grandmothers and mothers fought against.

    For example, once I called my grandma and asked her for her recipe for Cloud Biscuits, these delicious biscuits she used to make that we would cover with butter and homemade raspberry jam on Thanksgiving.

    "Why would you want that?" she said. "Go to the store. Go to the freezer section. Buy some pre-made biscuits and put them in the oven."

    She straight-up refused to give me the recipe, because it was hard and took a long time to make. In her mind, it was a waste of time.

    Getting off the phone, it occurred to me that spending every day of your life serving a husband and five children wasn't fun at all. And then there are the grandchildren who eventually come along demanding Cloud Biscuits, a whole new expanded set of people to feed.

    She was basically a slave to those hungry mouths, cooking scratch meals three times a day.

    When she wasn't trapped in the kitchen, she had to keep the house clean, make sure she looked good enough to be socially acceptable, and make sure her kids and husband looked good enough to be socially acceptable. And she had no days off.

    I know my grandma loves her kids and her grandkids, her husband and the life she led, but man, it must have been a lot of thankless, mindless labor.

    No wonder everyone went all-in on processed foods when they came around. Imagine the nice break something like a microwave dinner would give a woman working, unpaid, for her family every single day?

    I also had another grandma. She was a scholar who helped found the Center for the Study of Women in Society at University of Oregon. She was a pioneering second-wave feminist who wrote books, gave lectures and traveled the world.

    But, she did all of that after divorcing my grandpa, when most of her kids were out of the house. Back then, in the 1950s and the 1960s, there was no illusion about women "having it all". How could that even possibly happen? If you were taking care of a family, waiting on your husband, you had no time to follow your dreams, unless you made that your dream.

    A lot of women took that approach. We call it Stockholm Syndrome now.

    And of course, these women I am talking about are upper-middle-class white women. Romanticizing the 1950s is especially disgusting when you think about how women of color and poor women were treated back then, and the lack of education and choices available to them.

    Because the women in this country demanded something approaching equality, Holte has the chance to live out her fantasy. Not every woman in America is so lucky.

    We still don't have pay equality and in many states, we still don't have autonomy over our own bodies. Poor women and women of color still lack the opportunities of their wealthy and white peers.

    And while it's getting better, women are still expected to be responsible for the emotional labor of running a household and raising the children.

    But at least we can get jobs. At least we don't have to sew our own clothes, wear a full face of makeup every day and spend hours making Cloud Biscuits some ungrateful kid will wolf down, barely remembering to say thank you.

Brushing your teeth twice a day should keep the dentist away. But if a group of scientific researchers have their wish, it will make the rest of your body healthy too. A toothbrush that checks blood sugar and bacteria while you brush is currently in development in the USA. It is one of many gadgets (小器械) proposed by engineers and doctors at the Center for Future Health in New York.

The gadgets seem fanciful, but the basic principles are simple. The gadgets should make it easy for people to detect illness long before it strikes and so seek treatment far earlier than normal. Instead of relying on hi-tech hospitals, the emphasis (重点) is shifted to the home and easy-to-use gadgets. In the long run, the technology may even prevent illness by encouraging us to lead healthier lives.

Intelligent bandages are a good example. Powerful sensors within the bandage could quickly identify tiny amounts of bacteria in a wound and determine what medicine would work best. The cut could then be treated instantly.

The biggest development is melanoma(黑色素瘤) monitor designed to give early warnings of cancer. It could be used to take a picture of your body each week, and then compare it to previous images. If a problem is found, the system would advise you to get a check-up.

If all this sounds worrying, then help is at hand. Experts are also working on a "digital doctor", complete with a comforting bedside manner. A standard computer would be able to understand your voice and answer questions about your symptoms in plain English and in a way which could calm your nerves.

Stress is no sweat either. A portable communication aid could recognize certain phrases and tones and let you know when you are about to lose your temper. The software would also suggest ways of keeping your cool.

Researchers are still struggling, however, with making the technology cheap and simple enough for the household user. That is going to be the difficult part.

I'm a standup comic. One day, a woman from The Daily News called and said she wanted to do an article on me. When she had finished interviewing me for the article, she asked, "What are you planning to do next?" Well, at the time, there was absolutely nothing I was planning on doing next, so I asked her what she meant, pausing for a moment. She told me she was interested in me! So I thought I'd better tell her something. What came out was, "I'm thinking about breaking the Guinness Book of World Records for Fastest-Talking Female."

The newspaper article came out the next day, and the writer had included my parting remarks about trying to break the world's Fastest-Talking Female record. At about 5: 00 p.m. that afternoon I got a call from Larry King Live, which I had never heard of, asking me to go on the show. They wanted me to try to break the record, and they told me they would pick me up at 8: 00—because they wanted me to do it that night!

Then I sat down to figure out what on earth I was going to do on the show. I called Guinness to find out how to break a fast-talking record. They told me I would have to recite something either Shakespeare or the Bible. Shakespeare and I had never really gotten along, so 1 figured the Bible was my only hope. I began practicing and practicing, over and over again. I was both nervous and excited at the same time.

Then I decided just to give it my best shot, and I did. I broke the record, becoming the World's Fastest-talking Female by speaking 585 words in one minute in front of a national television audience. I broke it again two years later, with 603 words in a minute. My career took off.

People often ask me how I did that. I tell them I live my life by this simple philosophy: I always say yes first; then I ask, "Now, what do I have to do to accomplish that?" Then I ask myself, "What is the worst thing that can happen if I don't succeed? The answer is, I simply don't succeed! And what's the best thing that can happen? I succeed!

What more can life ask of you? Be yourself, and have a good time!

According to a new Agriculture Department report, U. S. forests could exacerbate global warming because they are being destroyed by natural disasters and are losing their ability to absorb planet-warming gases as they get older. The report predicts that the ability of forests to absorb carbon will start declining after 2025 and that forests could release up to 100 million metric tons of carbon a year as their emissions (排放) from decaying (腐烂的) trees go beyond their carbon absorption. Forests could become a "substantial carbon source" by 2070, the USDA report says.

The loss of carbon absorption is driven in part by natural disasters such as wildfires, tornadoes and hurricanes, which are increasing in frequency and strength as global temperatures rise. The disasters destroy forestland, destroying their ecosystem and decreasing their ability to absorb carbon, according to Lynn Riley, a senior manager of climate science at the American Forest Foundation. Aging forests also contribute. The report found that older, mature trees absorb less carbon than younger trees of the same species, and U. S. forests are rapidly aging.

This trend is likely to continue, as forests come under increasing threat from climate change and exploitation (开采). The typical tropical (热带的) forest may become a carbon source by the 2060s, according to Simon Lewis, professor in the school of geography at Leeds University. "Humans have been lucky so far, as tropical forests are cleaning up lots of our pollution, but they can't keep doing that indefinitely," he said. "We need to cut down fossil fuel emissions before the global carbon cycle starts working against us."

U. S. forests currently absorb 11 percent of U. S. carbon emissions, or 150 million metric tons of carbon a year, equal to the combined emissions from 40 coal power plants, according to the report. The loss of forests as natural carbon absorbers will require the U. S. to cut emissions more rapidly to reach net zero. "As we work to decarbonize (碳减排), forests are one of the greatest tools at our handling. If we were to lose that, it means we will contribute that much more in emissions." Riley said.