1.阅读下列短文,从每题所给的A、B、C、D四个选项中选出最佳选项。

Covid-19 vaccines (疫苗) began saving lives in clinical trials. But a new study, based in part on The Economist's estimate of the pandemic's true death toll (伤亡人数), attempts to model just how many lives have been spared since vaccines became widely available to the public.

The study— published on June 23rd in Lancet Infectious Diseases— found that in the first year of vaccines that were invented and introduced to the public , jabs (注射疫苗) saved the lives of people between 19.1 million and 20.4 million. Without vaccines, the study estimates, roughly three times as many people would have died from Covid-19 in 2021 alone. And 6.8 million — 7.7millon of the prevented deaths were in countries covered by COVAX ( Covid-19 Vaccines Global Access), an initiative created to ensure vaccines were sent to poorer countries. Still, a lack of vaccines in some parts of the world still led to avoidable deaths. Around 100 countries failed to reach the World Health Organization's (WHO) goal of vaccinating 40% of their qualified populations by the end of 2021. The researchers estimate that this cost around 600,000 lives.

To arrive at these estimates, the researchers, Oliver J. Watson, Gregory Barnsley and their colleagues at Imperial College London, began with an existing transmission model used to track the spread of Covid-19 infections. They then combined this model with The Economist's estimate of the pandemic's true death toll to estimate how deadly the pandemic would have been without vaccines.

As for the study, every coin has two sides. It relies on assumptions about the share of estimated infections that led to death, for instance. Some small countries, which have limited reliable data, were not included in the analysis. That means the total number of actual avoided deaths will be even higher. On the other hand, the researchers did not attempt to model how people or governments might have changed their behavior to limit infections in the absence of vaccines. For all that, it is the most definitive answer yet to how many people owe their lives to the jabs.

(1) Why are the vaccines significant according to Paragraph 2? A. They can slow down the pain of the patients. B. They can reduce the number of death toll. C. They can promote the development of drugs. D. They can realize the WHO's achievement.
(2) How do the researchers at Imperial College London draw the estimates? A. By developing the transmission model. B. By comparing data between model and study. C. By combining with the previous study. D. By tracking the spread of infections.
(3) What is Paragraph 4 mainly about? A. The limitations of the study. B. The assumptions of the study. C. The results of the study. D. The advantages of the study.
(4) What's the author's opinion about the current situation of vaccines? A. Uncertain. B. Pessimistic. C. Cautious. D. Confident.
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1.阅读理解

Douglas Smith, n gardener from Hertfordshire. the U.K., recently set a new Guinness World Record for the most tomatoes grown on a single stem (茎), 1,269.

Up until last summer, the record for the most tomatoes grown on a single stem had stood unchallenged for over a decade. Then English farmer Douglas Smith set his sight on breaking it, thinking that he could grow more than 488 fruits on s single stem. He proved that last year, when he managed to break the old record by growing 839 tomatoes on a greenhouse -grown plant. It was quite an achievement, but he was only getting started, as only a few weeks later Douglas Smith broke his own record by growing no less than 1,269 tomatoes on a single stem.

Is Douglas Smith a gardening addict? He spends up to four hours a day in his back garden tending his plants, and has been working hard on becoming the best possible gardener the world has ever seen. To maximize his chances of setting a new world record. he read various scientific papers and even took soil samples to be tested in a laboratory. And in the end, they all paid off.

"I am over the moon," Douglas said. "This year was only meant to be an experimental year to see which varieties would produce the most fruits and we had to fight with early blight (疫病), which put paid to a number of other tomato plants. I'm amazed by how many tomatoes were on the plant in the end."

Growing 1,269 tomatoes on a single stem is only Douglas Smith's latest achievement. In 2020, he grew a 20-foot-tall sunflower, and also set a new national record for the heaviest tomato, with a 3.106 kg tomato. He likes to run little experiments on other vegetables and crops, and he is currently experimenting on peas, aubergines and potatoes.

(1) What can we know about Douglas Smith from paragraph 2? A. He broke the old record twice B. He had planted the best tomatoes. C. He thought breaking the record was easy. D. He had worked to break the record for a decade.
(2) Which of the following can describe Douglas Smith best? A. Strict and tolerant. B. Attractive and brave C. Patient and hard-working. D. Friendly and humorous.
(3) What may be a challenge for Douglas Smith to break the old record? A. A lack of money. B. Skill shortages. C. Building a laboratory. D. Dealing with the blight.
(4) What is the last paragraph mainly about? A. The record's significance. B. Douglas Smith's next plan. C. The details about the heaviest tomato. D. More information about Douglas Smith's planting.
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2.阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。

Language Arts Games

MrNussbaum.com features challenging and exciting educational games for kids aged 4-14 to learn and practice topics. When you arrive on the game page, most have instructional videos underneath the game.

Ant-O-Nyms

You are an ant with your ant friends. Your goal is to go through the grass back to your ant home. Your knowledge of antonyms (反义词) will guide you. Choose the correct antonym for each word that appears and you will move in the right direction. Be careful though, you have seven minutes limit! If you take too much time, you'll become dinner for a hungry anteater.

Type: Word/ Phonics Game

International Pizza Delivery

In the game, users must deliver pizzas to all corners of the world using their geography skills. The object is to deliver as many pizzas as possible in six minutes. For each successful delivery, the user earns the flag of the nation. These flags may be printed out at the end of the game.

Type: Social Studies Fun

Spellerz

Spellerz is an application in which users can practice their spelling and typing. Users must type the words that flash on the screen correctly. The number of words increases with the correct typing. The time limit of the game is ten minutes. Teachers can also create their own word lists for students to use in the game.

Type: Spelling Game

Tony Fraction's Pizza Shop

Tony Fraction is a fun game. Students play the role of Tony, a pizza shop owner who must fulfill the requests of his demanding customers. Tony's customers order pizzas with fractions (分数) such as fourths, sixths, eighths, twelfths, and even sixteenths. Students have five minutes to fill as many pizza orders as possible with the goal of making as much money as they can.

Type: Math Game

(1) What type of game is Ant-O-Nyms? A. Math Game. B. Spelling Game. C. Word/ Phonics Game. D. Social Studies Fun.
(2) Which game has the shortest time limit? A. Spellerz. B. Tony Fraction's Pizza Shop. C. Ant-O-Nyms. D. International Pizza Delivery.
(3) What do the games have in common? A. They are all video games. B. They are all online games. C. They all have instructions. D. They are just kids' fun games.
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3.阅读理解

The world's largest iceberg is floating toward South Georgia in the southern Atlantic Ocean. Scientists fear the iceberg could crash into the island and block major feeding areas for a large population of penguins and seals. If the iceberg hits the island, it could prevent the penguins and seals from reaching food supplies.

The huge iceberg is named A68a. It broke away from Antarctica's Larsen C Ice Shelf in 2017. Satellite images show the iceberg has remained in one piece. It is estimated to be about 150 kilometers long and 48 kilometers wide. It is traveling at one kilometer per hour and is on a path to hit South Georgia in around 30 days.

This is the time of year when seals and penguins spend a lot of time caring for their young. The distance that parents have to travel to find food is crucial. That means they have to go a lot further or go around the iceberg to find sources of food.

Ecologists say an iceberg crash would also disturb materials settled on the seabed, possibly polluting the surrounding seas. As the iceberg melts, it would also release large amounts of fresh water into the ocean. This could affect krill (磷虾) populations that are a major source of food for the island's wildlife. The iceberg could remain for up to 10 years and change the area's whole ecosystem. These are globally significant populations of these species. If these species fail in this particular area, then the numbers globally are going to go down quite dramatically.

Professor Geraint Tarling, an ecologist at the British Antarctic Survey, said, "The breaking off of icebergs from Antarctica is a natural process. But the process is changing with climate change. What we're seeing with models and some observations now is that this is happening at an increasing rate. And so, this might become more of a usual thing in the future."

(1) Why are the scientists worried about the coming iceberg crash? A. It will bring extremely cold weather. B. It will destroy the feeding areas of the animals. C. It will put wildlife on the island at risk of starving. D. It will prevent animals from moving to other places.
(2) What is paragraph 2 mainly about? A. The characteristic of the iceberg. B. The importance of the iceberg. C. The traveling speed of the iceberg. D. The forming process of the iceberg.
(3) What damage can an iceberg crash bring according to paragraph 4? A. Using up much fresh water. B. Polluting the surrounding farms. C. Changing the world's ecosystem. D. Affecting the number of certain species.
(4) How does Tarling think of the breaking off of icebergs from Antarctica? A. It may slow down in the near future. B. It may become common in the future. C. It has a great influence on the climate. D. It helps scientists conduct a sea study.
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