1 . This is the time of year when many gardeners are harvesting tomatoes. Gardening expert Jessica Damiano recently reported about the many pictures of strangely shaped tomatoes sent to her from fans of her gardening advice.
Not every tomato on an affected plant will be deformed (改变形状), however. What are the possibilities? Under the right conditions (temperatures that are too hot or even too cold), this could affect one or two tomatoes per plant, depending on where they are in the development process and what the (weather) conditions are, said Timothy McDermott, a professor at Ohio State University. The possibility of one of your tomatoes developing a locule oddity (怪异) is about one in a thousand, McDermott said.
And, when harvesting your crop, remember:
| A．select the good-looking ones. |
| B．Any tomato can grow an extra locule. |
| C．the funny-looking tomatoes taste just as good! |
| D．What causes the unusual appearance of tomatoes? |
| E．Unless otherwise diseased, they are perfectly good for eating. |
| F．She said people sometimes question if the tomatoes are okay to eat. |
| G．Provide shade for your plants when temperatures are predicted to remain above 32℃. |
2 . When gardeners grow varieties of plants in their beautiful gardens, they are happy to see beneficial insects like bees and butterflies surrounding the flowers. But as they take a closer look, they may find some plants are covered in black dots and filled with harmful insects or pests. Some gardeners may immediately reach for chemicals.
If you are wise gardeners, you should first take preventive measures to control the harmful insects.
Prevention
As a rule, prevention is the best treatment. Inspect plants closely, including their leaves, before buying them from the store.
When planting, space plants out to permit them to grow to their full size. Plants too close together can breed harmful organisms, like bacteria.
Pesticides
If you decide a pesticide is necessary, choose it carefully and follow the directions and warnings on the product. Avoid using pesticides in extreme heat, on windy days, or when the plants are wet.
| A．But this is not wise. |
| B．In most cases, chemicals don’t help. |
| C．Treat the plants early in the morning or at night. |
| D．Also do remember the plants need nutrition and care. |
| E．Keep your garden free of fallen leaves, fruits and other wastes. |
| F．Do not bring any plants home that show signs of disease or pests. |
| G．The process starts with the idea that having some pests is acceptable. |
3 . “Consumers complain that the modern tomato has little flavor. It’s like a water bomb,” said Sanwen Huang, who works at the Agricultural Genomics Institute at Shenzhen at the Chinese Academy of Agricultural Sciences. “Tomato farmers care about yield, and the genetic variants related to yield are not related to tasty tomato favors.”
How can farmers ditch this unpleasant thing and recover the rich, sweet flavor of the tomato? To find out, Huang and colleagues investigated which genes are related to tomatoes’ taste. The scientists created a 100-person group that sampled 160 tomatoes based on sensory qualities. Based on the group’s feedback, the researchers identified dozens of chemical compounds (化合物) that could be related to the tomato’s taste. Using a statistical model that determined the concentration of various chemicals in the tomatoes, the scientists identified 33 most important flavor compounds. The researchers then measured the content of them in each of the tomatoes, and identified about 250 genetic loci (基因座) that controlled tomato flavor. This finding revealed the genetic basis of tomato flavor.
But the researchers also wanted to determine why store-bought tomatoes don’t taste good. It turns out that modern tomato varieties are selected according to qualities such as big size because buyers prefer large fruit, and firmness because it makes tomatoes easier to ship. Meanwhile, the quality of flavor has been ignored, said the researchers.
Volatiles (挥发性物质), in particular, are essential for good flavor. The removal of specific volatiles from tomatoes results in significant reduction in people’s liking. Moreover, refrigeration can change a tomato’s volatile compounds.
“But there is hope for a future filled with tasty, new varieties of store-bought tomatoes, as our results provide a road map for improvement of flavor. By working together, geneticists, biochemists, farmers and customers can provide better-flavored tomatoes for our society.” Huang said.
1. How does the author present the study in paragraph 2?| A．By giving a definition. | B．By listing figures. |
| C．By analyzing the cause. | D．By making a comparison. |
| A．The reasons why stores favor such tomatoes. |
| B．Some qualities consumers prefer in buying tomatoes. |
| C．The importance of volatiles in deciding tomato flavor. |
| D．The reasons why store-bought tomatoes have little flavor. |
| A．The store-bought tomatoes have a promising future. |
| B．Yield-related genetic variants provide tasty tomatoes. |
| C．Their research has changed a tomato’s volatile compounds. |
| D．Farmers and customers can certainly provide better-flavored tomatoes. |
| A．To persuade readers to buy tomatoes. |
| B．To introduce the high yielding tomatoes. |
| C．To prove store-bought tomatoes are tasteless. |
| D．To inform readers of the research about tomato flavors. |
4 . “A beautiful field of flowers can be a rather noisy place. It’s just that we can’t hear the sounds.” Scientists at Tel Aviv University have conducted a six-year experiment, proving that plants make noise in certain stressful situations.
Plants produce a high frequency (频率) clicking sound, and when short of water, or damaged, the clicks become far more regular. They also made different sounds, depending on whether they were thirsty or injured. “Each plant and each type of stress is related to a specific sound,” said Professor Lilach Hadany, who led the research study.
Focusing particularly on tomatoes, wheat and corn, the plants were placed in a soundproof(隔音的)room and recorded by microphones. Some plants were starved of water, others cut, and a control group was left undamaged. The researchers used an algorithm (算法) to separate the noises, suecessfully telling the difference between the sounds depending on whether they were dry or cut. The algorithm did this in a greenhouse setting which included far more surrounding sounds, but it was still able to recognize the particular cries for help of the plants.
On average, the human ear can hear sounds up to around 20kHz, while the sounds produced by plants are in the 40-80kHz region, far beyond our hearing. “The sounds made by plants can’t be heard by humans but can probably be heard by various animals, such as bats, mice and insects,” Hadany tells us. Though this has yet to be proven, it’s possible that these creatures use this information to choose which plants to eat.
A study led by Reda Hassanien of China Agriculural University in Beijing years ago, also proved that plants reacted to sound waves, with some plants greatly increasing their yield. While evidence shows that plants can react to sounds, there’s no evidence today that they can actually hear them.
1. What can we know from the six-year experiment?| A．Plants of different types make the sound of the same frequeney. |
| B．Plants produce more regular sound in certain stressful situations. |
| C．Plants make sounds with a much lower frequency when stressed. |
| D．Plants make the sound of the same frequeney whatever the situation. |
| A．To record the sounds. | B．To control the sounds. |
| C．To produce the sounds. | D．To identify the sounds. |
| A．Plants can hear each other’s cry for help. |
| B．Animals can hear the sounds made by plants. |
| C．Plants can make sounds and respond to sound waves. |
| D．Animals decide what to eat based on the sounds plants make. |
| A．Sounds That We Can’t Hear |
| B．Beautiful Songs from Plants |
| C．Plants React to Different Types of Stress |
| D．Plants Talk, Especially When Stressed |
5 . Trees naturally absorbed CO₂ through photosynthesis(光合作用), releasing oxygen, storing carbon for decades, or even centuries. Biotechnology firm Living Carbon says lab trials of its genetically-changed poplar trees take up more carbon and grow 1.5 times faster than unchanged ones. The team added genes from pumpkin to the poplars, which makes their photosynthesis more efficient, turning more carbon dioxide into sugars to create wood biomass(生物量).
Though the firm’s lab results are promising, biologists warn that high growth rates are not guaranteed in the wild as the poplars compete for sunlight with other plants and trees. Genetically-modified (GM)supertrees may also need much watering and fertilizer to keep their rapid growth.
The results are important given the rate of climate change and climbing CO₂ levels in the atmosphere. But critics say there are risks to planting GM trees in the wild if they reproduce with other trees, or negatively affect other plant and animal species. Living Carbon says trees are a hybrid that can only reproduce from cuttings, so cannot cross-pollinate(授粉) with wild trees.
If the field trials are successful then it will still take time to get approval from the government. One sixth, around 135, tree species in the US may face extinction due to climate change, foreign insect species, or disease. And even though field trials of a GM chestnut tree have shown its ability to resist some foreign disease that wiped out billions of American chestnuts, it still has not been approved for planting.
If CO₂ storage is the aim then there are species that already fit the bill. California’s Redwood trees store more carbon than any other species. Redwoods are not suitable for every forestry plot, so creating climate adaptable trees through reproducing programs that fit into local ecosystems is the goal. But in the rush to fix the climate crisis, increase CO₂ uptake, and carbon storage, GM supertrees may be part of that solution.
1. How was the poplars’ carbon capacity improved?| A．By absorbing carbon dioxide. | B．By producing wood biomass. |
| C．By speeding up photosynthesis. | D．By engineering their genes. |
| A．They reproduced with other plants. | B．It is impossible to get approval. |
| C．It is hard to grow fast in the wild. | D．They are not competitive enough. |
| A．Be unusual. | B．Be available. | C．Be unsuitable. | D．Be valuable. |
| A．Supertrees Could be Climate Fix. | B．Supertrees Take up More Carbon. |
| C．Change of Genes Reduce CO₂. | D．Changes of Genes Brings Efficiency. |
6 . Plants and exposure to greenery have been found to have mental health benefits and like any new skill or hobby, taking care of houseplants comes with difficulty. Anyone starting to care for plants should be patient and allow themselves time to learn the basics. Here are several plants recommended for giving mental health benefits:
Snake Plant
These popular indoor plants have a striking appearance, with dark green sword-shaped leaves that have yellow or white stripes. It is a great first plant, and is very easy to care for. It grows in spaces with low sunlight, has visual appeal and cleans the air.
Lavender
Well known for its relaxing smell, lavender has a calming effect, aids in reducing stress, promotes sleep and specially has anti-inflammatory (抗炎的) effects when used as a medicine for skin. You can cut it off and dry the leaves or even put them into your bath.
Pothos
If you want to go bright green, try pothos. The plants grow long stems that can hang from a pot and grow downward, or the stems can climb and grow upward. They clean the air and look beautiful hanging down a bookcase or shelf.
Lemon Balm
This fragrant green herb is part of the mint family and is simple to plant. Known for its calming properties, it has a light lemony smell and has been used to improve sleep, reduce stress and anxiety.
Basil
The experience of growing, picking and using herbs you’ve grown yourself has a positive impact on your mental health, creating a sense of accomplishment. Eating basil has health benefits too. It has properties that help to relieve stress and anxiety, and eating it can clear your mind.
1. What do snake plant and pothos have in common?| A．Long stems. | B．Bright green leaves. |
| C．Purifying the air. | D．Relaxing your mind. |
| A．Promoting sleep. | B．Resisting inflammation. |
| C．Reducing stress. | D．Clearing your mind. |
| A．Basil. | B．Snake Plants. | C．Pothos. | D．Lavender. |
7 . Plants and exposure to greenery have been found to have multiple mental health benefits, such as lowering stress, decreasing feelings of depression, increasing sociability, restoring focus, improving cognitive performance, improving mood, and increasing self-esteem.
Gardening and care for plants can help to turn people away from negative thoughts or emotions. So with all that, what do these experts recommend as the best plant?
Snake plant. It’s very easy to care for, thrives in spaces with low sunlight, has visual appeal, and cleans the air, and they are drought resistant if you forget to water them.
Spider plants. Spider plants, with plenty of light-green leaves, are another low-maintenance selection.When a spider plant thrives, it will grow new offshoots that can be clipped and potted as a new plant.
Aloe Vera. Drought-resistant and easy to grow. Aloe Vera is low-maintenance, you can just water it monthly, and it helps clean the airspace and is helpful for burns, cuts, and scrapes to help injuries heal faster or soothe pain.
Lavender is well-known for its relaxing scent, and it has a calming effect, aids in reducing stress, promotes sleep.This means it’s great both in the garden, or clipped and dried in a bowl inside your space .
Basil is a summertime herb that loves the sun. Not only is it delicious in meals, but eating basil has health benefits, too. It has properties which help to relieve stress and anxiety.
Lemon balm. This fragrant green herb is part of the mint family and is simple to cultivate. Known for its calming properties, it has a light lemony scent that can be wonderfully intensified by rubbing the leaves between your fingers. It has been used to improve sleep, reduce stress and anxiety, improve appetite, and help with indigestion.
1. What can we know from the passage?| A．Spider plants will still survive if you forget to water them. |
| B．Lavender is recognized for its mint scent and calming effects. |
| C．Snake plants grow well in spaces without enough sunlight. |
| D．Basil is not edible but has some valuable properties. |
| A．They need little water. | B．They appeal to the eye. |
| C．They help us calm down. | D．They enhance health. |
| A．Two | B．Three | C．Four | D．Five |
1. What is the main topic of the talk?
| A．Crop harvest. | B．Hot weather. | C．Food quality. |
| A．The same as last year. |
| B．Twice as much as last year. |
| C．Three times as much as last year. |
| A．Apples. | B．Peaches. | C．Oranges. |
| A．Profits are lower. |
| B．Quality is lower. |
| C．Prices are lower. |
9 . Trees are able to defend themselves against diseases. They have both protective structures and protective processes. Thanks in large part to research done by Dr. Alex Shigo, we now know a great deal more about the way trees protect themselves than we did 50 years ago.
Just as our skin keeps harmful bacteria on the outside, bark (树皮) keeps out tree diseases. Since they can’t move around to avoid dangers, trees need thicker “skin” than we do. Living and non-living tissues protect tree trunks, roots, and branches from mechanical injury, drying out, and diseases.
But when something destroys this first line of defense — tears through the bark — what happens internally is interesting. When an injury occurs, a tree will transform some of its stored sugars to make masses of defensive chemicals, which are then distributed in a specific pattern internally around the wound. Dr. Shigo was the first to document this pattern, which he called CODIT — Compartmentalization (分室化) of Decay (腐烂) in Trees.
In making these CODIT compartments, trees form chemical walls to protect themselves from infection. The success of this walling-off process depends a lot on the species. Hard maple, for instance, can generate a strong CODIT response while species like soft maple achieve only an average level. Some, on the other hand, barely manage to form any chemical walls.
Overall tree vitality is another important factor. Even a hard maple may not be able to form strong chemical walls if it’s in a weak state. By definition, landscape trees are stressed as compared to their forest-living cousins. A street tree is worse off, faced with limited root space, air pollution, and more. The size of the injury also makes a difference. Even a healthy tree can have its defenses destroyed by a large wound.
Humans can help maximize trees’ defense capability by watering during dry seasons, keeping things out of the root zone, etc. In return, trees will help keep us in good health by offering shade, beauty, and companionship.
1. What will happen first if diseases come close to trees?| A．Infection will occur internally. | B．Bark will provide protection |
| C．Chemical walls will take effect. | D．Defense chemicals will be formed. |
| A．Groundbreaking. | B．Conservative. | C．Ambiguous. | D．Straightforward. |
| A．Trees can form chemical walls |
| B．The size of the injury affects CODIT. |
| C．Trees cannot protect themselves if weakened. |
| D．The effectiveness of CODIT varies among species. |
| A．The gift of the trees. | B．The magic of CODIT. |
| C．The function of the bark. | D．The self-preservation of the trees. |
10 . Plenty of studies have investigated how climate change could be harmful to the production of coffee bean crops, with research released in 2019 suggesting that 60 percent of known coffee species could be in danger of going extinct. But a new scientific review has attempted to focus specifically on how global warming might affect the taste and smell of coffee. Bad news is that not only could the coffee of the future be harder to come by, it could taste bad, too.
“A low-quality cup of coffee has economic influences as well as sensory(感官的)ones,” Sean Cash, professor at Tults’ Friedman Nutrition Science explained. “If we can understand the science of these changes, we might help farmers better manage coffee production in the face of this and future challenges.”
Specifically, researchers identified two factors that had the most consistent association with quality: higher altitude produced coffee with better taste and smell; and too much sunlight led to decreased quality.
That first factor could be significantly affected by global warming. “Higher altitudes are connected with cooler temperatures. It results in slower ripening(成熟), long-time fruit-fill, and higher accumulation(积累)of taste and smell,” the paper states. “What may happen to coffee quality at higher altitudes with increased temperature linked to climate change? And we need to know climate adaptation is needed for coffee agricultural systems at all altitudes.
On the other hand, reducing sunlight exposure(暴露)is easier to deal with. “While light exposure is shifting with climate change, this can be controlled in coffee agricultural systems. Through shade management including developing shade-grown coffee systems with best levels of coverage, the paper continued. Shade management is a relatively easily reached climate adaptation strategy compared to relocating farms.”
Still, the study's biggest takeaway was the more work needs to be done to ensure our coffee tastes. “This systematic review highlights that coffee quality is sensitive to climate change and climate adaptation,” the conclusion stated. “Given the sensitivity of coffee quality to environmental change, evidence-based innovations are called for to enhance the sustainable development of the coffee industry in the context of global change.”
1. What is the purpose of the new study?| A．To find ways to stop the global warming. | B．To prevent the coffee from going extinct. |
| C．To help farmers increase the products of coffee. | D．To help farmers improve the quality of coffee crop. |
| A．It helps the coffee grow fast. | B．It offers coffee enough sunlight. |
| C．It offers coffee enough time to ripe. | D．It is easier for farmers to take care of coffee crop. |
| A．To relocate coffee farms. | B．To develop effective shade systems. |
| C．To grow coffee crops in higher altitude farms. | D．To make the coffee adapt to the climate change. |
| A．The future of coffee crops. | B．What affects coffee production |
| C．Climate change affects coffee quality | D．The challenges coffee crops are facing |
