1 . Supermarket shelves are filled with plant-based alternatives (可代替品) to cow milk, including soy, nut, and coconut milk. These products are popular with consumers who cannot drink cows’ milk for health reasons, as well as with those concerned about animal welfare and environmental sustainability. While the dairy-free (非乳制的) options work well with cereal or in coffee, they fail miserably when it comes to making milk-based products like cheese or yogurt. However, these shortcomings may soon be a thing of the past, thanks to a new company in California, which has figured out how to create animal-free milk in a laboratory!
Perumal Gandhi and Ryan Pandya founded the company in 2014 after becoming increasingly annoyed with the lack of cows’ milk-free alternatives, particularly for cheese. For Gandhi, who stopped consuming animal products five years earlier due to environmental and animal welfare concerns, the motivation to create a better alternative stemmed from his love of cheesy pizza. Pandya was spurred (被激发) to take action after being forced to eat some “really bad” dairy-free cream cheese on his sandwich.
The two MIT biomedical engineering scientists decided to join forces to create a more realistic alternative to dairy-based products. In their university lab, the pair spent nine months first isolating (分离) cow DNA then inserting it into yeast (酵母). This genetic modification (改造) enabled the yeast to produce the necessary milk proteins. The final step of the process involved mixing the proteins with some plant nutrients and fats.
The dairy-free milk not only tastes like the real thing but is also healthier, has a longer shelf life and, most important of all, is Earth friendly. According to the company’s website, when compared to conventional (常规的) milk production, their process uses 65% less energy, creates 84% less greenhouse gas emissions (排放) and requires 91% less land and an amazing 98% less water! Best of all, since it contains real milk proteins, the product behaves like the cow-produced version, which means vegetarian (素食的) consumers will no longer have to deal with the unpleasant cheese on their sandwiches and pizzas.
The company plans to bring their creation to market later this year and their first product will most likely be cheese since there are already many good cows’ milk products available to consumers.
1. The underlined word “those” in paragraph 1 refers to _______.| A．actions | B．products | C．people | D．reasons |
| A．their deep concern for the environment |
| B．their worry that farm animals were poorly treated |
| C．the over-consumption of the dairy-based products |
| D．the poor taste of dairy-free cheese presently available |
| A．The dairy-free products cannot be stored for a long time. |
| B．Cow farming causes considerable environmental damage. |
| C．The new products will taste better than dairy-based ones. |
| D．The dairy-free milk will be more expensive than cow’s milk. |
| A．Healthier Cheese |
| B．New Milk Saves Planet |
| C．Making Milk without Cows |
| D．Fresher Milk, Better Future |
2 . Something strange happened when I was 14 years old. Every previous year on Thanksgiving Day I’d woken up early, filled with excitement. But that Thanksgiving, for some reason I saw no reason to celebrate. None of my family were really thankful, I realized. The whole thing was a lie!
During the dinner time, I left, hiding in the guest room and cried. My mom came to see what was wrong. “No one is really thankful!” I sobbed, “They just pretend for one day because that’s what they’re supposed to do!”
After I finished talking, she nodded. “You’re right,” she told me. “It’s fake until you find the truth for yourself.” She said it was my choice whether to celebrate with them or not. She said Thanksgiving is a time to reflect because we don’t always get to see loved ones and eat a good meal. Then she left.
I didn’t listen to her, thinking that every holiday was a lie and I could never find joy celebrating again. But giving in to my starving stomach, I went back to the dining room in a few minutes. I couldn’t believe what I saw. My entire extended family was waiting for me with wide smiles and concerned looks, and the table was covered with untouched plates.
“Andy,” my aunt said, “We can’t eat without you. We’re waiting for your turn. Now you can start it.” I didn’t know what to say first. Finally, I said I was thankful for having a younger brother to teach, play with, and see grow.
The family shared, and everyone had something beautiful to say. Listening to what they said, I suddenly understood what my mom meant about finding out my own reason for celebrating. For me, this holiday was a chance to pause and reflect on everything I cared about.
And with that, I took a huge and satisfying bite of food.
1. Why did the author hide himself and cry on the Thanksgiving Day?| A．Because he got up too late |
| B．Because some of his family were absent. |
| C．Because he thought the dinner was tasteless. |
| D．Because he doubted the sincerity of others’ thankfulness. |
| A．She is very understanding. | B．She is strict with the author. |
| C．She disagreed with the author. | D．She showed great worry about the author. |
| A．Having dinner. | B．Expressing thankfulness. |
| C．Giving a performance. | D．Making a wish. |
| A．My loving mother | B．Love and lies |
| C．An inspiring Thanksgiving | D．An unforgettable dinner |
3 . Scientists say they've developed a system using machine learning to predict when and where lighting will strike. The research was led by engineers from the Swiss Federal Institute of Technology in Lausanne, Switzerland.
European researchers have estimated that between 6,000 and 24,000 people are killed by lightning worldwide each year. The strikes can also cause power outages, destroy property, damage electrical equipment and start forest fires. For these reasons, climate scientists have long sought to develop methods to predict and control lightning. In the United States and other places, ground-based sensing devices are used to identify strikes as they happen. But, no system has been created to effectively predict lightning.
The system tested in the experiments used a combination of data from weather stations and machine learning methods. The researchers developed a prediction model that was trained to recognize weather conditions that were likely to cause lightning.
The model was created with data collected over a 12-year period from 12 Swiss weather stations in cities and mountain areas. The data related to four main surface conditions: air pressure, air temperature, relative humidity and wind speed.
The atmospheric data was placed into a machine learning algorithm（算法）, which compared it to records of lightning strikes. Researchers say the algorithm was then able to learn the conditions under which lightning happens.
Amirhossein Mostajabi is a PhD student at the institute who led the development of the method. He said, “current systems for gathering such data are slow and complex and require costly collection equipment like radar or satellites.”
“Our method uses data that can be obtained from any weather station,” Mostajabi said. “This will improve data collection in very remote areas not covered by radar and satellite or in places where communication systems have been cut,” be added.
The researchers plan to keep developing the technology in partnership with a European effort that aims to create a lightning protection system. The effort is called the European Laser Lightning Rod project.
1. Why have climate scientists tried to predict and control lighting?| A．To collect relative data. |
| B．To reduce the destruction lightning has been causing. |
| C．To create a scientific system. |
| D．To do research in relation to machine learning. |
| A．air pollution | B．wind speed |
| C．relative humidity | D．air temperature |
| A．lighting. | B．the system being tested. |
| C．the atmospheric data. | D．the machine learning algorithm. |
| A．He developed the method and the system himself. |
| B．He thinks the current systems are too slow and simple. |
| C．He is a professor at the Swiss Federal Institute of Technology. |
| D．He believes their system does much better in data collection. |
4 . The great-grandmother is learning English with the help of her family when she is at the age of 91. She hopes to use the language at next year’s Olympic Games in Tokyo. Takamizawa was one of the more than 200, 00 people who requested to volunteer for Tokyo’s 2020 Games. English is not required for service, but it is a useful skill for volunteers to have.
But Takamizawa had not been able to learn the language when she was young. Takamizawa said that she was in high school when World War Two started. She said, “In my second year there, English was banned because it was the enemy language.”
Takamizawa said her grandchildren helped persuade her that she was not too old to learn. “When I talked to my grandchildren about my wish, they said, ‘It’s not too late. We will teach you one word a day’ ”. Natsuko is Takamizawa’s granddaughter and main English teacher. Natsuko sends a new English word to her grandmother’s phone every day. They also often work together directly on phrases that Takamizawa will need for the Olympics. “Welcome to Tokyo, this is the Olympic stadium, how can I help you?” Takamizawa answers when asked to say an English phrase she has learned. Natsuko explains that she wanted to give her grandmother something to enjoy. “I can clearly see her English is getting better. It’s my joy now.”
The EF English Proficiency Index is a measure of the level of English spoken in a country. Japan ranks 49th among countries where English is not the first language. This situation is slowly changing as younger generations welcome English. However, Takamizawa believes real change will not happen unless Japanese people become more open to the rest of the world. With around 500 days to go until the games begin, the whole Takamizawa family is ready to welcome the world to Tokyo.
1. Why couldn’t Takamizawa learn English when she was young?| A．Because English was useless. |
| B．Because she was too young to learn English. |
| C．Because English was forbidden to learn. |
| D．Because she was unwilling to learn English. |
| A．Takamizawa gets strong support from her family. |
| B．Takamizawa’s grandchildren love her a lot. |
| C．Natsuko is Takamizawa’s granddaughter and only English teacher. |
| D．Natsuko teaches Takamizawa English mainly by talking with her. |
| A．English is not the first language in Japan. |
| B．The level of English spoken in Japan is relatively low. |
| C．Younger generations in Japan welcome English. |
| D．Japanese people become open to the rest of the world. |
| A．Where there is a will, there is a way. | B．It is never too late to learn. |
| C．The early bird catches the worm. | D．Two heads are better than one. |
