Porridge doesn't have a very tasty name, does it? It doesn't have a very tasty reputation, either. I'm here to try and convince you that porridge isn’t boring and tasteless, that it can be a delicious, convenient and very healthy way to start the day.
If you’ve never eaten it (although you probably have), porridge is a type of food served for breakfast. It is usually a type of grain, like rice or oat (燕麦), mixed with either milk or water, and often heated up. It is often thicker than liquid, but not solid and is very easy to digest, so it's a better option for people who are ill, and it provides long-lasting energy for the day.
Porridge preparation--the amount of ingredients (配料) and cooking time—depends on what you choose to use as your porridge base. If I'm cooking for myself, I put a very big handful of ‘rolled’ oats in a saucepan, add a little bit of water and about 200ml of milk, and let the mixture boil. I stir the porridge constantly, and it takes about five to ten minutes to cook.
Once it's cooked, the fun part is adding the flavors. Porridge alone doesn't have a very strong flavour. Although some people think this makes porridge boring, I think this is what makes porridge exciting! It is like a blank piece of paper—you can add almost anything you want to the porridge base. Greens, nuts and dried fruits are very healthy options to add and can give you energy for the day. But if you don't like these, or you're allergic, then honey and chocolate are also very tasty options. (Just don’t add to much!)
One of the best things about porridge? You can make it almost anywhere in the world. Either oats or rice or both are “staple foods (主食)” for many people across the world. You can usually buy big bags of either, then add local ingredients to make your porridge interesting—whatever is cheap and convenient to find, wherever you are. I am currently in Mexico, and I love to heat my oats up with milk, then mix in peanuts and pumpkin seeds and cacao nibs, and I put a layer of sugar over the top to make my porridge sweeter.
Porridge? Hopefully it sounds a lot tastier now!
1. According to the author, what is the best thing about porridge?| A．It provides long-lasting energy for the day. |
| B．It is cheap and convenient to make. |
| C．It's a better option for people. |
| D．It is never boring and tasteless. |
| A．To give brief introduction to various porridge. |
| B．To show how to prepare porridge for the patient. |
| C．To warn us not to have porridge for breakfast. |
| D．To introduce the benefits of porridge. |
| A．Porridge is often thicker, liquid and solid. |
| B．Porridge alone has a very strong flavor. |
| C．Porridge is to many people's liking. |
| D．Porridge is only served for breakfast. |
| A．Porridge with Sugar. | B．Porridge with oats. |
| C．Porridge with fruit. | D．Porridge with milk. |
相似题推荐
【推荐1】Fruits and vegetables bring some pretty attractive benefits to our human bodies. Evidence shows that, when consumed daily, they can help reduce the risk of diseases, including heart disease and some cancers. There’s also some research to suggest they may protect against type-2 diabetes.
While most fruits come ready to eat, vegetables usually get some sort of cooking before they reach your plate.
One Chinese study compared the effects of five cooking methods on the nutrient levels in broccoli. The researchers found that, except for steaming, all cooking methods led to significant losses of vitamin C.
As ever, there are a few exceptions.
A 2017 study also found that frozen vegetables preserved more nutrients than fresh ones that had been kept in the fridge for five days.
| A．So, how you store vegetables counts, too. |
| B．This matters, because cooking affects nutrient levels. |
| C．According to this, we should find out the best cooking method. |
| D．Some nutrients tend to be more available when boiled for a longer period. |
| E．However, the way you prepare your vegetables actually affects the benefits. |
| F．Other studies have investigated the impact of cooking on a broader range of vegetables. |
| G．However, evidence showed that some fresh vegetables can be preserved for a longer time. |
【推荐2】How to Make a Chinese Hot Pot
Eating a Chinese hot pot is a very common experience. People gather around the pot, dipping their food, waiting for it to cook, mixing their own seasonings (调味品) and enjoying each other's company.
Firstly, prepare a large pot of soup. There is no right or wrong way to prepare a soup, so feel free to make your own. A simple soup can be made by boiling water with the addition of meat bones or fish heads and a mixture of herbs, seasonings and vegetables.
Then, cut a variety of meats and fish into thin slices.
| A．Finally, arrange the seating reasonably |
| B．Now comes the turn to enjoy your hot pot |
| C．It will guarantee that the items will cook quickly and fully |
| D．Here are some easy steps to make a Chinese hot pot at home |
| E．For more variety, consider dumplings, rice cakes and tangyuan |
| F．Popular choices include: cabbage, pea leaves, winter melon and tomato |
| G．It usually lasts a couple of hours because you are cooking and eating in small parts |
【推荐3】Growing up in Philadelphia, Lieberman started cooking with his stay-at-home dad when he was seven. His food-loving family had two kitchens, and he quickly learned what was the best way to bake his cakes. Lieberman improved his kitchen skills greatly during a year abroad before college, learning from a cook in Italy and studying local specialties(特色菜) in Germany, Spain, and France.
At Yale, he was known for throwing dinner parties, single-handedly frying and baking while mixing drinks for dozens of friends. Just for fun, he and some friends decided to tape a show named campus cuisine(菜肴) about his cooking. Lieberman was a real college student showing his classmates how to do things like making drinks out of dining-hall fruit. That helped the show become very popular among the students. They would stop Lieberman after classes to ask for his advice on cooking. Tapes of the show were passed around, with which his name went beyond the school and finally to the Food Network.
Food Network producer Flay hopes the young cook will find a place on the network television. He says Lieberman’s charisma is key. “Food TV isn’t about food anymore,” says Flay. “It’s about your personality and finding a way to keep people’s eyeballs on your show.”
But Lieberman isn’t putting all his eggs in one basket. After taping the first season of the new show, Lieberman was back in his own small kitchen preparing sandwiches. An airline company was looking for someone to come up with a tasteful, inexpensive and easy- to-make menu to serve on its flights. Lieberman got the job.
1. We can learn from the text that Lieberman’s family_______.| A．have relatives in Europe | B．love cooking at home |
| C．often hold parties | D．own a restaurant |
| A．at one of his parities | B．from his teachers |
| C．through his taped show | D．on a television program |
| A．A natural ability to attract others. | B．A way to show one’s achievement. |
| C．Lieberman’s after-class interest. | D．Lieberman’s fine cooking skill. |
| A．He is clever but lonely. | B．He is friendly and active. |
| C．He enjoys traveling around. | D．He often changes his menus. |
【推荐1】A recent study showed that disordered eating has negative effects on health including lower self-evaluation of health, which isn’t too surprising. What was really shocking was how common the disordered eating behaviors seemed to be in our culture.
Individually, these behaviors aren’t something to be overly concerned about, but when they add up, it became a roadblock to healthy living. Ask yourself the right questions to find out if you, too, have gone beyond healthy habits and worry about your weight.
For example, starchy(含淀粉的) foods can make people feel uneasy about eating them. Sometimes an ingredient, like fat, causes anxiety, even if it’s used to make healthy foods like olive oil. If you’re skipping foods and blaming it on an allergy(过敏) reason, but your real motivation is to lose weight, that’s a red flag.
A strict eating schedule might seem like a smart way to provide structure throughout your day, but overdoing it can leave you feeling hungry.
Not having control over how your food is prepared can be a concern, especially if you have food allergies. It’s when that anxiety is baseless and prevents you from otherwise enjoying a night out that it becomes a problem.
Tracking calories can be a useful tool to understand which foods are rich in calories, which ones aren’t, and what calorie range you should be eating. If it becomes overbearing, it’s no longer a healthy method. It’s the right way to pay attention to your hunger and satiety(饱足), and rely on those to decide when to start and stop eating.
Disordered eating is common, but it’s not harmless. Seek out help if you see yourself in these behaviors, and make sure you recognize the signs that you’re already at a health weight.
1. What does the underlined part “a red flag” in the third paragraph mean?| A．A good means. | B．A negative attitude. |
| C．A warning sign. | D．A normal situation. |
| A．Tracking calories can be a useful tool to keep fit. |
| B．Disordered eating is common but harmful. |
| C．Skipping foods won’t help you lose weight. |
| D．Knowing how your food is prepared can be beneficial. |
| A．avoid starchy foods | B．lose weight |
| C．prepare your food well | D．turn to the doctors |
| A．using examples | B．making a comparison |
| C．asking and answering | D．analyzing causes and effects |
【推荐2】To write his book about world diet, nutritionist Harley Paster traveled to the healthiest countries around the world to learn more about what made their meals special.
He noted that Japanese people ate a wonderful variety of seaweeds, and that Chinese people tried to include at least five different colors in every meal. Paster also came away with some valuable observations about how different the North American way of life was, compared with many other countries.
For starters, Americans eat much bigger portions than people in other countries. “We don’t prioritize (优先) eating seasonally or locally, and we also add lots of salt, sugar and thickening agents to our foods,” explained Paster. Contrast that to the healthy Mediterranean, Nordic and Okinawan diets listed in Paster’s book. They all seem to stick to the ethos (特质) of regional, seasonal produce.
For example, a traditional Mediterranean diet includes fruits, vegetables, whole grains, nuts and olive oil as the main components of nutritional intake. Fish, chicken and red wine make appropriate appearances, while red meat, salt and sugar are used much less often. The benefits of a traditional Mediterranean diet have been studied since the 1970s, and researchers have found that living that olive oil life can help people lose weight, lower their heart disease risk and reverse diabetes (糖尿病). Most other healthy eating cultures also make meals an event—say, multiple courses around the family table, or a glass or two of red wine at a long lunch— rather than fast wolfing down handfuls of cereal above the kitchen sink and calling it dinner.
Each of the healthy eating cultures has its own unique feature. But Paster did take note of one unifying factor in all of the healthy societies he observed. “The only common feature in most of these healthy countries is that they all walk more than the average American,” said Paster. “So really, regardless of what you’re eating, if someone’s walking four miles more than you each day, they’re going to be a lot thinner and live a lot longer than you.”
1. What characterizes Japanese and Chinese foods?| A．Naturalness. | B．Flavor. | C．Color. | D．Variety. |
| A．Fruits and vegetables. | B．Seasonal local produce. |
| C．Olive oil and red wine. | D．Unprocessed ingredients. |
| A．They get the whole family to eat at a table. | B．They eat their meals regularly as scheduled. |
| C．They attach great importance to their meals. | D．They consume plenty of cereal for breakfast. |
| A．walk at least 4 miles a day | B．consume a lot more organic food |
| C．pay more attention to body shape | D．do considerably more walking |
On Beacon Hill, just south of central Seattle, landscape developers and a few affordable-food advocates are building an eatable food forest. Everything grown in the area will be eatable. And it’ll be open around the clock to anyone who wants to come and pick some fresh blueberries or pears.
Organizers shared with National Geographic a list of the crop offerings. Many are expected: apples, berries and tomatoes. But others are pretty far-out. A large Asian community in the area suggested things like Asian pears and honeyberries. A European influence led to the planting of medlar trees.
The concept is modeled on permaculture, a design system and school of thought emphasizing the use of renewable nature resources and the enrichment of local ecosystems. Offering people free, fresh food is one motivation, but making the land useful and ecologically enriched is the larger goal.
That being said, some potential problems come to mind. What if all of one fruit is gone the first weekend when it’s ripe? What if people pick things too early and spoil the potential for everyone?
Organizers aren’t concerned about those questions. “We’ve had many discussions about what would happen if someone comes and picks all the blueberries,” says Margarett Harrison, the landscape architect designing the project.” But that’s been considered as a good thing. We’ll just plant more.”
Anything related to agriculture and good food — in large quantities — takes time. Most of the trees won’t be mature enough for a few more years. But a few decades could make the area impressively productive.
Idealistic? Perhaps. But it’s the kind of idealism that anyone who likes to eat fresh things from time to time can get behind. And that’s the type of motivation that organizers hope will keep going.
1. Paragraph 3 is mainly about _______.
| A．the crops that will be harvested this fall |
| B．people’s attitude towards the project |
| C．which communities live in the area |
| D．how the food selection was made |
| A．Concerned. | B．Cautious. |
| C．Optimistic. | D．Uninterested |
| A．Seattle’s free food experiment |
| B．what the future of forests will be |
| C．agricultural development in Seattle |
| D．how to keep in harmony with nature |
Three theories
Amelia Earhart, the first woman to fly alone across the Atlantic Ocean, was attempting a round- the-world flight in 1937. She planned to land on the tiny Pacific Ocean island of Howland. She never arrived. Her fate, and that of her navigator (导航员)Fred Noonan, remains one of aviation’s (航空的)greatest unsolved mysteries. Researchers have spent millions of dollars investigating the case and several books have been published that examined different theories.
The official US position is that Earhart ran out of fuel and crashed in the Pacific Ocean. The radio log from aUS Coast Guard ship indicates that she must have been near Howland when contact was lost
Another theory says that Earhart could have crashed on a different island, called Nikumaroro, and died since the island is uninhabited.
Yet another theory claims she was captured while on a secret mission to the Marshall Islands in the North Pacific and eventually returned to the US with a new identity.
Lost and found?
The missing pilot
February 18, 2011
Amelia Earhart’s dried saliva (唾液)could help solve the longstanding mystery of the aviator’s 1937 disappearance, according to scientists who plan to take samples of her DNA from her correspondence. A new project aims to create a genetic profile that could be used to test recent claims that a bone found on the South Pacific island ofNikumaroro is Earharf s.
Justin Long, a Canadian whose family is partially funding the DNA project, points out that at the moment, anyone who finds parts of bones can claim that they are Earhart’s remains. According to Justin Long, Earhart's letters are the only items that are both proved to be hers and that might contain her DNA. Hair samples are one of the best sources of DNA, but no hair samples from Earhart are known. There was, in theory, a sample of Earhart's hair in the International Women’s Air and Space Museum in Cleveland, US. However, a 2009 study revealed that the sample was actually thread.
The remains of Earhart, her navigator Noonan, and their twin-engine plane were never recovered. But in 2009, a group of researchers found a bone fragment on Nikumaroro that they believed might have been from one of Earhart' s fingers. However, some scientists have suggested the Nikumaroro bone fragment isn’t human at all but may instead belong to a sea turtle that was found nearby.
The new Earhart DNA project will be headed by Dongya Yang, a genetic scientist at Simon Fraser University in Canada. Yang will work on four letters Earhart wrote to her family. Much of Earhart's correspondence was done by her secretary but the assumption is that Earhart must have sealed the envelopes of these personal letters herself.
1. Why are there so many theories concerning where Amelia Earhart was?| A．It is still a mystery. |
| B．She left with some secrets. |
| C．Her flight cost much money. |
| D．She returned with a new identity. |
| A．To search Nikumaroro more thoroughly. |
| B．To confirm if a bone belongs to Amelia Earhart. |
| C．To find out who Amelia Earhart often wrote to. |
| D．To locate Amelia Earhart’s remains accurately. |
| A．None of Amelia Earhart’s DNA has been collected so far. |
| B．Amelia Earhart took delight in writing letters to her family. |
| C．The Nikumaroro bone fragment belonged to Amelia Earhart. |
| D．The hair sample in Cleveland’s museum was Amelia Earhart's. |
【推荐2】Less than two months away from the Spring Festival, sales on travel websites start to hit a seasonal high. As the influence of Chinese New Year expands, international tourism also helps to introduce this indispensable cultural heritage to every corner of the world, which means in 2023, more Chinese people choose to spend their holidays overseas.
Big time for family trips
According to the statistics posted by Ctrip, one of the biggest platforms for travel products, the top 10 most visited countries by Chinese tourists will be Japan, Thailand, Singapore, Australia, Vietnam, Indonesia, the United States, Malaysia, Philippines and Italy.
Over 70 percent of travelers decide to have a family vacation abroad. “The bookings on our website have risen 32 percent compared with the Spring Festival season last year. And the prices are 10 percent higher,” said Zou Qingling, outbound tourism manager of Lvmama. “Some of our packages to Europe or the US have already been fully booked.”
Flexible schedules favored
Though the holiday officially spans Feb. 4 to 10, many choose to leave their office in advance or postpone the return date. In this way, they will manage to avoid the crowds at the airports, and save a considerable sum on hotels and flight tickets.
If you haven’t planned anything yet, here is an important tip — leave before Jan. 31 or after Feb. 6. The most expensive time to travel is between Feb. 2 and 6, with an average of over 10,000 yuan per person.
Different places, same customs
Family trips pay special attention to tradition and customs, especially during the most conventional holiday in Chinese culture. Many people still believe that the Spring Festival is about family and the joy of reunion. To create a homey experience overseas, travel agencies design a variety of events including a New Year’s Eve dinner on the Nile, making dumplings at a Parisian castle, and a Chinese New Year gala at a five-star hotel in Amman. World-famous landmarks also receive a Spring Festival makeover. From Feb. 2 to Feb. 17, Universal Studios Hollywood will dress its cartoon characters in traditional Chinese costumes.
If you are one of those who want to celebrate the Spring Festival at home, enjoy your homecoming. But if you haven’t made up your mind for the moment, it’s never too late to try something new and plan a family trip abroad during the New Year.
1. To save money, your family is most likely to travel abroad between ________.| A．Feb. 1 and 5. | B．Feb. 2 and 6. | C．Feb. 5 and 10. | D．Feb. 7 and 11. |
| A．India has been rated among the top 10 most visited countries by Chinese. |
| B．It is impossible to reserve any package tour to the US from Lvmama now. |
| C．One will find the trip fairly cheap as long as avoiding it between Feb 2 and 6. |
| D．A Chinese family may experience a festival atmosphere abroad during the New Year. |
| A．To introduce the growing popularity of international tourism. |
| B．To give suggestions on appropriate time for traveling abroad. |
| C．To recommend making overseas tours in the Spring Festival. |
| D．To promote the role traveling plays in spreading Chinese culture. |
【推荐3】We do not usually think about how our language works. Talking is such a natural, everyday activity that we do not often stop to consider how it actually works. When we do study our language, though, we are often surprised that we are able to understand our conversations. Words can mean so many different things. However, it turns out that the speaking situation helps a lot in making language work.
First, the speaking situation helps make words more particular. For example, the word "dog" can describe a dog that a speaker saw in a dream. It can also be used to discuss a neighbor's dog. No language has a separate word for the idea "dog that I saw yesterday" and another word for the idea "dog that I saw in a dream". This is because the speaking situation makes it clear what speakers mean when they use words. So, when you have a conversation with your neighbor, the knowledge that you have a dog tells your neighbor what the word "dog" probably means in that situation.
The speaking situation also helps make language clearer. For example, the word "bank" has two possible meanings. It can mean "a place where people keep money", but it can also mean "the side of a river". So the sentence "I went to the bank." Is not clear. It could mean I went to the side of the river or it could mean I went to the place where my money is kept. However, if the speaker is talking about fishing or going to the mountains, others probably know that "bank" means "the side of a river".
The things that speakers say may not always be clear. Sometimes the words are not very particular, but the speaking situation can provide the meaning. Other times words may have many meanings. Then the speaking situation limits the right meaning. This extra knowledge from the situation is very important to understand language.
1. The passage is mainly about ________.| A．the best time and place to talk to others |
| B．how the speaking situation helps language work |
| C．what to say in difficult situations |
| D．how our language works |
| A．the speaking situation does not affect the meaning of words |
| B．speaking is not very natural for most people |
| C．the speaking situation is not important |
| D．people often do not consider how talking works |
| A．a word may need to be explained in a conversation |
| B．a word may have different meanings |
| C．the speaking situation helps people understand the particular meaning of a word |
| D．the meaning of words is not particular |
| A．the attitude of the speakers in the conversation |
| B．the occupation of the person who uses the word |
| C．earlier or later parts of the conversation |
| D．a reliable dictionary |
【推荐1】The best movies for teenagers are listed here. You can pick one for your teen to watch it with you or their best friends.
1. Eighth Grade
Kayla is a shy, socially anxious girl trying to get by the last few weeks of middle school. She earns the “most quiet” girl title in school, but at home, she posts online self-help and motivational videos that not many people watch. Kayla is raised by her single father Mark, who tries to disconnect Kayla from the social media.
2. Dead Poets Society
Mr. Keating, an English teacher, introduces his students, all set to become doctors and lawyers, to poetry and free-thinking. Each of his students deals with several issues. He encourages them to form the Dead Poets Society where they read and write poetry.
3. The Hunger Games
Based on a book by Suzanne Collins, the story is set in a country called Panem, which was once the ruins of North America. Every year, young boys and girls from the 12 districts of Panem fight in the Hunger Games, a televised competition in which the contestants (参赛者) compete against death.
4. The Break fast Club
It begins with five students at the Shermer High School, Claire, a princess, John a criminal, Andrew, an athlete, Brian, a bookworm and Allison, an unfortunate person, who are forced to spend 9 hours together on a Saturday. In spite of their differences, they find that their social problems are more similar than they think. The film tries to encourage breaking social boundaries for positive self-identification in the world.
1. Who helps teenagers form a society?| A．Mr Mark. | B．Mr Keating |
| C．Suzanne Collins. | D．Ms Claire. |
| A．Eighth Grade. | B．Dead Poets Society. |
| C．The Hunger Games. | D．The Break fast Club. |
| A．Teachers. | B．Teens. |
| C．Friends. | D．Parents. |
【推荐2】After braving wind, snow, and dizzying heights in the mountains, a dog named Mera may have broken a world record without even knowing it. She began following a group of climbers who were getting ready to climb up to the top of Mount Baruntse in Nepal—it stands just south of Mount Qomolangma at 23,389 feet tall. Mera was easily frightened when the climbers first met her down in the village of Khare, so they were shocked when she suddenly bounded up next to them while they were coming down another mountain at 17,000 feet.
Mera had passed dozens of other climbers that she could have pleased, and focused her eyes on the leader of this month—long expedition, Seattle—based Don Wargowsky. In no time they were like peas and carrots. Don happily shared his sleeping bag,tent,and meals with his new companion while the crew was hiking to the Mount Baruntse Base Camp over the next two weeks.
When it finally came time to depart from the base camp and begin their climb up the mountain, Don knew the walk was not easy for a dog, so he tied her up near the camp.“She kept barking as we walked away,” said Don. “Half an hour into our climb I felt a tickle（发痒）on the back of my knee. I looked down and saw Mera following right behind me just like before.”
After reaching the last mountain camp before the summit, the climbing crew left Mera sleeping in Don’s tent with the hope that she would not try to follow them up the steep climb. Don was then surprised when he later turned around at 22,000 feet in order to take a photo only to see Mera climbing towards them slowly. Finally, after a long climb, they reached the summit and took photos celebrating the first dog to top Mount Baruntse.
1. What was true about Mera when the climbers first met her?| A．She had just broken a world record. | B．Clearly it was easy for her to be scared. |
| C．The heights of the mountains dizzied her. | D．She bounded up next to them now and then. |
| A．they preferred peas and carrots | B．they knew how to survive the cold |
| C．they got along very well together | D．they were faithful climbing lovers |
| A．it was difficult to wake her up | B．she kept troubling them on the way |
| C．she was too weak to go on climbing | D．the climb was more dangerous for her |
| A．Poor but lovely. | B．Strong and helpful. |
| C．Smart but noisy. | D．Brave and determined. |
“Planting trees is one way, but it isn’t that simple. It doesn’t solve the basic issue of water resources,” says Wu Bo, a professor. “We need to calculate how much water the trees will absorb, or else it could have a negative effect.”
Villagers in Zhengxin have taken on this challenge, with limited success. When the irrigation channels began to run dry, Lu Xianglin switched from wheat to cotton on his land. He also planted trees to protect his fields from sandstorms. He says he still gets good yields（产量） using flood irrigation and earns a good income for his family.
Other farmers haven’t stuck it out（坚持到底）: about one in three have left Zhengxin in the past 10 years after their wheat crops died. Young people who can find jobs in the towns rarely return.
Last week, Mr Lu joined the other men in his village on a government-arranged trip to see the land that has been set aside for their relocation, nearly 40 miles to the south. The next day, he was back, shaking his head at the plan. The idea of uprooting his family troubles him, as does the idea of giving up the land that fed his forefathers. He prefers to stay and keep up the fight.
“With enough water, this problem can be solved,” Lu says. “We can plant trees and grass, and they will grow bigger. That will stop the desert.”
Experts say that farmers could switch to drip irrigation （滴灌）to lessen their water intake for growing crops. Elsewhere in the region, farmers have built brick greenhouses as part of a plan to grow vegetables using less water. Roadside signs urge farmers to “Save Water, Protect the Environment”.
1. The negative effect of planting trees in deserts is that __________.
| A．it can make groundwater become less |
| B．it can prevent the sand moving freely |
| C．it can stop crops growing well |
| D．it can get the soil to become poor |
| A．Because the plan of relocation will cost him much money. |
| B．Because his family had trouble moving away. |
| C．Because he was reluctant to give up his land. |
| D．Because he would rather stay than fight against the deserts. |
| A．The deserts drive more and more people to leave their homes for their lives. |
| B．People have no means to fight against the land becoming desert. |
| C．Water is the biggest barrier for people to stop the desert. |
| D．Planting trees cannot solve the problem of desertification of farmland. |
| A．To plant more trees. |
| B．To build greenhouses. |
| C．To change crops. |
| D．To use drip irrigation. |
