1 . In the thick jungle of New Guinea is nature’s most amazing theater, a Carola’s parotia (天堂鸟) is showing off his red and yellow feathers in a display called a “butterfly dance.”
This brilliantly colored birds of paradise have developed over millions of years from ancient birds whose feathers were dark and boring in comparison. It seems to be a contradiction (矛盾) that such extreme feathers and colors could have been favored by the process of evolution. After all, these same brightly colored feathers that attract mates also make the birds much more noticeable to predators (捕食者). The answer lies in the safe environment in which the birds live, and a process of evolution known as sexual selection. Except for other pressures, birds of paradise begin to specialize in attracting mates. Over millions of years they have slowly undergone changes in their colors, feathers and other talents. Characteristics that made one bird more attractive than another were passed on and impove over time.
In the past, demand for the bird’s feathers resulted in a huge amount of hunting. At the peak of the trade in the early 1900s, 80,000 skins a year were exported from New Guinea to Europe ladies’ hats. Nowadays, few birds die for fashion or for traditional costumes: Ceremonial feathers are passed down from generation to generation. Although local people are still permitted to hunt the birds for traditional uses, they usually target older male birds, leaving younger males to continue breeding.
David Mitchell, a conservationist, is relying on the help of local villagers to record where the birds display and what they eat. He hopes to not only gather data, but also encourage protection of the birds’ habitat. The strategy seems to be working. For millions of years, these impressive birds have danced to find their mates. They will keep dancing for as long as the forest offers them stage.
1. Why do the birds of paradise evlove the bright cholors?| A．To frighten away predators. | B．To execise and clean bodies. |
| C．To show the possession of an area. | D．To attract a mate’s attention. |
| A．Industrial development destroyed their habitat. | B．A high demand for feathers to use in hats. |
| C．They were eaten by the predators. | D．They got sick after inteactions with human. |
| A．To eat them. | B．To protect smaller birds. |
| C．To make traditional costumes. | D．To keep their numbers down. |
| A．Feathers of Love | B．Trouble in Paradise |
| C．An Amazing performance | D．The Protection of Birds of Paradise |
2 . The Grand Canal, a large waterway that first connected north and south China over 1400 years ago, is shorter than it once was, but it is still the longest man-made river in the world.
The original Canal system began around the year 605. China’s emperor realized that he needed a better way to feed his army. Specifically, he needed a way to move food quickly from China’s southern rice-growing region to the country’s north. Thus, he spent 6 years on construction of the first section of the Grand Canal, connecting existing canals, lakes and rivers. However, by 1127, parts had begun to worsen. In 1279, Kublai Khan began to repair and create a more direct north-south route to and from Beijing.
The Grand Canal was also an important cultural channel. Soldiers, merchants and artists transported ideas, regional foods and cultural practices from one part of China to another. It is said that Peking duck and the Pecking opera were both brought north via the canal. Even today, the country’s watery highway plays an important economic role in China. In addition, local governments, eager to increase tourism and real estate (房地产) development, are beautifying areas along the Canal.
This development comes at a price, though. In Yangzhou, the city government has torn down almost all of the older Canal-side buildings. Farther south in the cities of Zhenjiang, Wuxi and Hangzhou, the situation is similar. “Traditionally, we talk about eighteen main cities on the Grand Canal, and each had something unique and special about it.” explains Zhou Xihua, the director of the Grand Canal museum. “But now many of these cities are all the same: a thousand people with one face.”
In 2005 a group of citizens proposed that the historic Grand Canal be made a UNESCO world heritage site. The status would protect both the waterway and architecture around it. “Every generation wants the next generation to understand it, to look at its monuments.” said Zhu Bingren, an artist who cowrote this proposal. UNESCO status was officially granted in 2014. The hope now is that the grand Canal, one of the world’s great engineering accomplishments, will continue to link north and south China for centuries to come.
1. Why was the Grand Canal originally built?| A．To allow his army to move more quickly. |
| B．To transport food from the south to the north. |
| C．To enable people to visit remote parts of China. |
| D．To promote the cultural and traditional diversity. |
| A．It is the longest man-made river in the world. |
| B．It orginally complete construction in the year 611. |
| C．Its original north-south route is to and from Beijing. |
| D．It allowed Peking duck and the Peking opera to spread. |
| A．Developing the canal involves spending a lot of money. |
| B．Even after spending money, people dislike the development. |
| C．Developing it is more expensive than one can imagine. |
| D．There are some negative consequences to this development. |
| A．The history of the Grand Canal. | B．The introduction of the Grand Canal. |
| C．The construction of the Grand Canal. | D．The proection of the Grand Canal. |
3 . Germany’s top court (法院) has ruled that parts of the country’s 2019 climate action law must be changed because they don’t do a good job of protecting young people. Nine young people aged 15 to 24 took the government to court over the law. They said that the government’s failure to plan carefully was putting their future lives in danger.
The judges (法官) of Germany’s highest court said climate change will influence young people far more than adults. That’s because climate change will become more serious over time. As young people become adults, they’ll be left to deal with any problems that today’s adults don’t deal with.
In 2019, Germany passed a new law, promising that the country would be producing no more CO2 than the forest can take in by 2050. The law made a plan of action until 2030. But the law didn’t have any plans for climate actions that would be taken between 2031 and 2050.
The court has asked the German government to fix the law by the end of 2022. The climate law will now need to have a plan for the actions that will be taken after 2030.
The German government has said that it will quickly begin working to make the needed changes. One important part of high court decisions like this is that they act as guides or examples for future decisions. This means that in the future, Germany’s lawmakers will be more likely to think about the climate future of young people as they create their laws.
1. Why did the judges make such a decision?| A．They decided the new law made no sense. |
| B．They wanted to give the young more rights. |
| C．They focused more on the future of the young. |
| D．They thought it’s hard to solve climate change. |
| A．It failed to take action before 2030. |
| B．It was producing more and more CO2. |
| C．It refused to consider the young’s rights. |
| D．It didn’t plan the climate actions after 2030. |
| A．It will make more decisions on climate change. |
| B．It will ask the young to help make climate laws. |
| C．It will consider the young when making climate laws. |
| D．It will encourage the young to protect the environment. |
| A．They were brave and forward-looking enough. |
| B．They couldn’t bear the present climate change. |
| C．They wanted to take part in law-making. |
| D．They planned to work in the government. |
1. What did researchers study in two tests?
| A．The way of seagulls’ stealing food. |
| B．The effects of staring at seagulls. |
| C．The different food thieves. |
| A．They flew away immediately. |
| B．They stood still and looked at the food. |
| C．They made an attempt to steal food. |
| A．They snatched food violently. |
| B．They stole food secretly. |
| C．They attacked people aggressively. |
| A．By feeding them first. | B．By setting a big trap. | C．By staring at them. |
1. What can be seen from space?
| A．The smoke in the Arctic. |
| B．The wildfires in Scandinavia. |
| C．The melting ice in Greenland. |
| A．In Greenland. | B．In Alaska. | C．In Siberia. |
| A．Strong winds. |
| B．More lightening strikes. |
| C．High temperatures. |
| A．The Arctic fires. |
| B．The habitat loss. |
| C．The death of animals. |
6 . It was a typical summer day in my small town, with the sun shining and the sky clear. I was sitting on my porch, enjoying the peaceful view of the rolling hills and the calm lake, when suddenly a strong wind blew in from the west. The peaceful sky turned dark as a storm approached.
I went inside, grabbing my raincoat and heading to the barn to secure the animals. The cows were nervous, sensing the approaching storm. I quickly tied them up and ran back to the house, just as the rain started to pour down. The wind was howling and the rain was pounding against the windows. Lightning and thunder followed, making the atmosphere even more electric. I sat by the window, watching the raging storm and praying that everything would be okay.
After what seemed like hours, but was only a few minutes, the storm passed. The clouds moved away, revealing a bright and sunny sky. I walked outside, taking in the fresh air and surveying the damage. The trees were bent over and some branches had been blown off. Our vegetable garden was flooded, but other than that, everything seemed to be fine. I breathed a sigh of relief as I realized that no serious damage had been done.
That evening, as I sat by the fireplace with a cup of hot coffee, I reflected on the experience. It reminded me that nature can be both powerful and unpredictable, but that we must persevere and adapt to whatever it throws at us. The next morning, as I watched the sun rise over the now-calm landscape, I felt a sense of pride knowing that my family and I had weathered the storm together.
1. What does the word “weathered” mean in the last paragraph?| A．enjoyed | B．survived | C．forecasted | D．changed |
| A．Angry | B．Relieved | C．Scared | D．Sad |
| A．Problem and solution | B．Cause and effect |
| C．in order time | D．by Comparison |
| A．The author explains how to prepare for and cope with a storm. |
| B．The author describes how a storm ruined his day and his garden. |
| C．The author compares and contrasts the different weather conditions in his town. |
| D．The author recounts how he and his family withstood a sudden storm and learned a lesson from it. |
7 . Heat waves are becoming more common in parts of the United States — and that means more people running their air conditioners for longer. But those air conditioners can make the problem worse, giving off greenhouse gases as they work that contribute heavily to climate change.
SkyCool Systems is trying to break that cycle, using technology that promises to offer buildings an alternative means to cool down in a similar way to how the planet cools itself. “Our planet naturally cools itself by sending heat out in the form of infrared light (红外线) or radiation,” said Eli Goldstein, SkyCool’s cofounder and CEO. “We do this through rooftop panels, which look like solar panels but actually do the opposite, reflecting 97% of the sunlight that hits them and cooling the surface below,” said Goldstein.
SkyCool’s model involves fixing a network of pipes below those panels. These pipes are filled with water, which is kept cool by the panels and then flows into an air conditioning system. This process is designed to take pressure off the system’s cooling mechanism. And because the panels cool naturally and don’t need external power to function, it helps the entire system use less electricity.
A Grocery Outlet store in California, which has been using SkyCool’s system since last year, says it saw a marked drop in its electrical bills. Jesus Valenzuela, the store manager, estimates that the panels have saved his store roughly $3,000 a month.
But perhaps the biggest barrier to making the technology ubiquitous (无处不在的) is its relatively high cost. Increasing production could help bring the cost down, Goldstein said, particularly for developing countries in Asia and Africa where SkyCool hopes to eventually expand. For now, the company is focused on commercial applications of the technology, though it hopes to start setting up panels on the roofs of individual homes. “We’re just excited to be able to use this new technology for good,” Goldstein said.
1. How did Goldstein explain the way their rooftop panels work?| A．By citing an expert’s words. | B．By making comparisons. |
| C．By analyzing cause and effect. | D．By describing the process in detail. |
| A．To store cold water to help cool the panels. |
| B．To help ease the water pressure of the air conditioning. |
| C．To power the panels by making use of flowing water. |
| D．To feed cold water into the air conditioning system. |
| A．It’s pretty effective. | B．It has increased sales for his store. |
| C．It will go out of style quickly. | D．It will cost too much to set up. |
| A．It’ll bring in a good profit for the company. | B．It’ll gain popularity in developed countries. |
| C．It’ll take the place of air conditioners. | D．It’ll be accessible to common households. |
8 . Blowing Up Balloons with CO₂
Chemical reactions (化学反应) make for some great experiments. You can make use of the CO₂(carbon dioxide) given off by a baking soda (小苏打) and lemon juice reaction to blow up your balloon!
What you’ll need:
●Balloon ●About 40ml of water ●Soft drink bottle
●Juice from a lemon ●I teaspoon of baking soda
Instructions:
●Before you begin, make sure that you pull the balloon long to make it as easy as possible to blow up.
●Put the 40ml of water into the soft drink bottle.
●Add the baking soda and mix it with water.
●Put the lemon juice in and quickly put the balloon over the mouth of the bottle.
What’s happening?
If all goes well, then your balloon should inflate! Adding the lemon juice to the baking soda creates a chemical reaction and produces CO₂. The gas rises up and escapes (逸出) through the soft drink bottle. It doesn’t, however, escape the balloon, pushing it outwards and blowing it up.
1. Which of the following do you need for the experiment?| A．Two cups. | B．Apple juice. |
| C．250 ml water. | D．A teaspoon of baking soda. |
| A．Heat the water. | B．Drink some juice. |
| C．Blow up the balloon. | D．Pull the balloon long. |
| A．To describe an experiment. | B．To introduce a game. |
| C．To produce soft drinks. | D．To save some chemicals. |
9 . Depending on the right combination of currents and wind, a large mass of Sargassum “seaweed”circling the Gulf of Mexico may soon wash up along the US coast near Florida. The bloom (藻华)，which is likely to be the largest ever recorded，is visible from space.
Sargassum is a type of leafy, rootless algae that form large floating mats on the ocean floor. It can be found in the Sargasso Sea and was first mentioned by Christopher Columbus in 1492 when he was afraid his ship would become trapped in it.
Sargassum is an important habitat for marine species because it provides food, shelter, and breeding grounds. It absorbs carbon dioxide, an important greenhouse gas that contributes to global warming, just like other floating marine vegetation, according to Phys.org. However, when tons of it gathers along coastlines, it sends out a terrible strong smell which can cause headaches, eye discomfort, and upset stomachs. Too much algae on beaches can harm marine ecosystems and make it difficult for people to keep on with their recreational and fishing activities, costing communities millions of dollars.
Scientists have been tracking the formation of large Sargassum blooms. However, this year’s bloom could be the largest ever, covering more than 8,800 kilometers from the coasts of Africa to the Gulf of Mexico and weighing 10 million tons.
It is critical to improve Sargassum management. The Food and Agriculture Organization of the United Nations (FAO) not only advocates best practices in Sargassum cleanup and removal, but also cooperates with governments and communities to develop policies, standards, and measures to protect public and environmental health. FAO is also promoting ways to repurpose Sargassum, turning it into products to provide additional employment and income. In fact, small businesses are already using Sargassum to make bricks, shoes, soaps and paper. Larger businesses are considering turning Sargassum into renewable energy, bioplastics, and compost.
1. Why does the author mention space in paragraph 1?| A．To stress the Sargassum bloom is massive. |
| B．To explain how currents and wind combine. |
| C．To show what the Gulf of Mexico looks like from space. |
| D．To demonstrate how the Sargassum movement was tracked. |
| A．Sargassum’s significance in the marine economy. |
| B．The process of Sargassum’s moving to the coast. |
| C．Sargassum’s contribution to reducing global warming. |
| D．The double-edged effects of Sargassum’s existence. |
| A．They participate in cleanup activities. |
| B．They help rebuild marine ecosystems. |
| C．They create products from Sargassum. |
| D．They transform Sargassum into resources. |
| A．Smelly Seaweed Bloom Heads to Florida |
| B．FAO Now Works on Reducing Marine Litter |
| C．Groundbreaking Project Turns Sargassum into Plastics |
| D．Sargassum is Changing the Beach Vacation in Mexico |
10 . When Richard Oswald was growing up in northwestern Missouri in the 1950s, his dad had a firm rule: Don’t plant corn until mid-May. But that rule has become a relic of the past. In Rock Port, a small farming community near the Nebraska border, the growing season now begins more than a month earlier.
That’s not surprising. Across much of the US, winter is not as cold as it used to be. The four warmest Januaries on record have all occurred since 2016. In Missouri, winters are about 4 degrees hotter on average than in 1970-and farmers are starting to feel the effects.
As the planet continues to warm, cold winter weather will become less common, said Amy Butler, a re-search scientist studying climate variability. “However, less cold does not mean never cold.” Butler said. In the past decade, Liz Graznak’s organic vegetable farm near Columbia, Missouri, has endured increasingly extreme swings in weather. “We don’t get a couple of inches of snow; we get 18 inches of snow all at once and then in five days, it’ s 70 degrees again.” Graznak said. “We don’t get a couple of inches of rain; we get a 12-inch downpour in the span of 24 hours. That’s devastating(毁灭性的)to a vegetable farm.”
To help protect her crops, Graznak has built four large greenhouses on her property in just over a decade. Inside, she’s able to grow delicate, high-value crops, including flowers, lettuce and spinach.
But these greenhouses come at a steep cost. Nearly seven years ago, Graznak spent more than $18,000 to build a greenhouse and since then, the price has more than doubled. “When I think about these costs, in my brain, I say, ‘OK, how many heads of lettuce is that?’” She said. “I know I can sell a head of lettuce for $4, so how many heads of lettuce do I have to sell to be able to pay for that greenhouse? And that’s a lot of lettuce.”
1. What does the author want to show by telling Richard Oswald’s story?| A．New farmers should learn to farm on their own. |
| B．New farmers aren’t as experienced as old ones. |
| C．Following traditional farming rules is essential. |
| D．Climate change is changing farming rules. |
| A．Many extreme weather events. |
| B．A winter without any cold days. |
| C．Less snow and rain on the whole. |
| D．More stable temperature than before. |
| A．The profits of her farm have increased. |
| B．She has lost hope in the future of farming. |
| C．The cost of farming has greatly increased. |
| D．Budgeting is important in modern farming. |
| A．Farmers in the US are troubled by floods |
| B．Farmers are worried about the future of farming |
| C．Farmers are feeling climate change’s effect in the US |
| D．Farmers are turning to greenhouses due to climate change |
