1 . Some of our planet’s power pollinators (传粉昆虫) may have originated tens of millions of years earlier than scientists once believed. In a study published July 27 in the journal Current Biology, a team of researchers traced bee family back over 120 million years to the ancient supercontinent Gondwana (冈瓦纳大陆). While looking deeper into bee history, the team found evidence that bees originated earlier, diversified faster, and spread wider than previously suspected, putting together pieces of a puzzle on the origin of these pollinators.

In the study, an international team of scientists would be in sequence and compared genes from over 200 bee species. They then compared these bees with the traits from 185 different bee fossils and extinct fossils to develop an evolutionary history and genealogical model for how bees have historically been spread around the world. The team was able to analyze hundreds of thousands of genes at a time to make sure that the relationships they inferred were correct.

“This is the first time we have broad genome-scale data for all seven bee families,” study co-author and Washington State University entomologist Elizabeth Murray confidently said in a statement. Earlier studies established that the first bees potentially evolved from wasps (黄蜂), transitioning from predators up to collectors of pollen and nectar (花蜜). According to this study, bees arose in the dry regions of western Gondwana during the early Cretaceous period, between 145 million years ago to 100.5 million years ago.

“There’s been a long-time puzzle about the origin of bees,” study co-author and Washington State University entomologist Silas Bossert said in a statement. “For the first time, we have statistical evidence that bees originated on Gondwana. We now know that bees are originally southern hemisphere insects.” The team found evidence that as new continents formed, the bees moved northward. They continued to diversify and spread in parallel partnership with flowering plants called angiosperms. The bees later moved into India and Australia and all major bee families appear to have split off from one another before the beginning of the Tertiary period (65million years ago).

1. What’s the purpose of bee history researchers do research on?

A．To discover the origin of these pollinators.

B．To find out some reasonable proofs.

C．To know much about our planet.

D．To study the life of bee species.

2. Which can replace the underlined phrase “in sequence” in Paragraph 2?

A．in danger.

B．in need.

C．in order

D．in favor.

3. What’s the viewpoint of Elizabeth Murray to the bee family?

A．Unbelievable.

B．Reliable.

C．Positive.

D．Negative.

4. What does the last paragraph mainly tell us?

A．The earliest home of bees may be in Gondwana.

B．The world’s earliest bees were found in India and Australia.

C．The researchers are going on doing research on bee families.

D．The researchers get a lot evidence to prove their research.

3 . Asia,the largest continent on Earth,is home to more than half of the world’s population. With so many different cultures and languages, each country is worth a lifetime to travel around. Here are some top countries for you to have an unforgettable travel experience .

China
China owns one of the world’s oldest civilizations(文明). Wherever you go, you can easily recognize many amazing historical and cultural landmarks. For example, the Great Wall of China, the Terracotta Army in Xi’an and the Forbidden City in Beijing attract many visitors all over the world. However,other people come to enjoy China’s beautiful scenery that includes high mountains and the Gobi Desert. As the most populous(人口多的)nation on Earth, China is also home to many modern cities.

India

Home to one of the world’s richest and oldest civilizations, India has many different cultures, religions, peoples and traditions. With the Himalayas lying in the north, jungle and beaches can be found in the rest of the country. From temples to food and history to wildlife, the beautiful country has something for everyone.

Thailand

Thailand is a very popular tourist attraction. Its golden sands and beaches attract lots of people every year. Many also come to party in its beachside towns, visit some beautiful and peaceful islands such as Ko Tao, or enjoy the attractive scenery at Krabi.

Japan

Although it consists of almost 7,000 islands, most of Japan’s main sights and tourist attractions can be found on the four largest of them.   Lying to the east of Asia, the island nation is an attractive place as a mixture of traditional palaces and modern buildings Covered in mountains and forests, the country is home to some delightful nature and scenery.

1. Which one is the most populous country on Earth?

A．China

B．Japan

C．India

D．Thailand

2. Where should you go if you want to enjoy the beaches according to the text?

A．India and China	B．Japan and China
C．China and Thailand	D．India and Thailand

3. In which section of a newspaper may this text appear?

A．Sports

B．Music

C．Science

D．Travel

4 . You may have recently seen a video from the Beijing Wildlife Zoo becoming a hit. What exactly was so interesting about this video? It shows a dog playing with big cats four to five times its size! Many people might wonder if this dog has a death wish, but it seems that the dog and the big cats are good friends.

The dog was actually raised alongside the lion and tiger cubs, making up an odd but loving family, according to zoo officials. As opposed to the common belief, cross-species friendship has been around for centuries. People have domesticated many animals, most notably cats and dogs, and formed bonds with them as pets. Perhaps you even have a pet yourself.

There are many other instances of cross-species friendships.

At an animal sanctuary in Santiago, Chile, a jaguar named Marina and a deer named Laura formed a friendship after they both came to the park. As neither animal had a mother, sanctuary staff said they instantly bonded when they met. Laura had been rescued from a slaughterhouse while Marina had been rescued from the street.

One possible explanation for these friendships is the environment of the zoo. Animals don’t hunt for their food and don’t need to worry about marking their territory or looking for mates in the way an animal in the wild would. “All those activities take time and energy, and if these needs are removed, the animals get bored,” Gordon Burghardt, a psychologist at the University of Tenessee, US, told The Atlantic magazine. “In this particular situation, the animal’s motivation to engage socially and playfully may be higher in its need hierarchy(等级)than eating.”

Marc Bekoff, former biology professor at the University of Colorado, US, told Slate magazine, “I think the choices animals make in cross-species relationships are the same as they’d make in same-species relationships. Some dogs don’t like every other dog. Animals are very selective about the other individuals who they let into their lives.”

1. What is the common opinion about the friendship between animals?

A．It’s easier for dogs and cats to become friends.

B．Animals tend to play with peers of the same species.

C．The friendship between animals is not solid and reliable.

D．It’s common that animals of different species can become friends.

2. Why are Marina and Laura mentioned in paragraph 4?

A．To present a truth.	B．To explain a phenomenon.
C．To introduce the topic.	D．To provide a proof.

3. What’s the key factor of the animals’ friendship in the zoo according to Gordon Burghardt?

A．The existing tradition.	B．The influence by mates.
C．The animals’ inner social drive.	D．The animals’ raisers’ instruction.

4. What’s the purpose of the passage?

A．To appeal to people to treasure animals.

B．To inform readers of a special friendship.

C．To demonstrate the history of bringing up pets.

D．To compare friendship between cross-species and same-species.

7 . Climate change is causing more areas to turn into deserts. This issue is affecting the lives of 250 million people as land that used to be good for farming becomes dry and unproductive. Around one-third of the world’s land is impacted, including regions in Africa, southern Europe, Asia and America.

Sand to Green is a Moroccan company that can transform a patch of desert into a sustainable (可持续的) and profitable plantation in five years, according to Wissal Ben Moussa, its co-founder and chief agricultural officer. The solution is using agroforestry (农林业)to create a new kind of agriculture that is sustainable and that can be resilient (有适应力的) in front of climate change.

The system can be set up close to any source of salty water, which Sand to Green cleans using energy from the sun. It then grows different types of fruit trees and plants together in the same area—a method called mixed planting—and waters the plants’ roots directly with the cleaned water, to reduce water loss to the air. The soil is regenerated using what Sand to Green calls “green manure”, a mixture that includes compost, biochar(生物炭)and microorganisms that help the soil “wake up”. Biochar is a form of charcoal that can help dry soil hold on to water.

In a five-hectare trial in southern Morocco that’s been running since 2017, Sand to Green has tried out a variety of plants in search of the best performers. Among the intercropping herbs (草本植物) that have been successfully trialed are rosemary, geranium, vetiver and citronella, which Ben Moussa describes as “very low-maintenance and very high-profit”.

Sand to Green is now working to scale up to a 20-hectare commercial site, also in southern Morocco. It says a site of that size would cost around $475,000 to set up and would start bringing financial returns in about five years.

According to Ben Moussa, with this system they create biodiversity, which means better soil, healthier crops and a bigger yield. The plantation can generate 1.5 times more yield, thus making more money than a farm that grows only one type of crop in the same space.

1. What phenomenon does the author describe in paragraph 1?

A．Deforestation.	B．Desertification.
C．Global warming.	D．Urbanization.

2. Why did Sand to Green use agroforestry?

A．To preserve the crop’s survival rate.

B．To protect water from pollution.

C．To make a new type of soil.

D．To help people adapt to climate change.

3. What can we learn about Sand to Green?

A．It aims to plant more trees.

B．It earns a good reputation.

C．It develops new plants.

D．It produces good results.

4. What does the underlined phrase “scale up” mean in paragraph 5?

A．Expand.

B．Object.

C．Refer.

D．Prefer.

9 . The aftermath (后果) of an earthquake can be horrible, but it is important that you are attentive and focused after an earthquake happens. Fires, gas leaks, and injuries are all dangers you might face after an earthquake.     1     By assessing the safety of your location and following the directions of local authorities, your chances of surviving the aftermath of an earthquake will be much higher.

Check yourself for injuries.     2     If you’re bleeding, lift your injury up and put pressure on it. If your injury is serious, call for help using a cellphone or try to get rescuers’ attention.

    3     Use a cellphone to call for help if you have one. If you can’t use a phone, try knocking loudly on something nearby until rescuers find you.

Aftershocks are smaller earthquakes which follow the main shock of an earthquake.     4     So you should prepare to move to a safe location, like an open outdoor space or a structurally sound building.

Exit the building and go to a safer place once the shaking has stopped. The structure of the building you’re in may have been weakened by the main earthquake.     5    

A．Signal for help if you are trapped.

B．They can cause significant damage.

C．Remain calm as the earthquake occurs.

D．The more prepared you are, the safer you’ll be.

E．Make sure you’re not seriously hurt before you do anything.

F．After the earthquake, you must get medical treatment in time.

G．Therefore, you should leave as soon as possible in case of any aftershocks.

10 . Living on the Florida Emerald Coast, people view a hurricane as a common thing. So it is not unusual for a family to have several full gas cans and bottled water stored in their houses all summer.

Though unwilling to evacuate from a hurricane, on September 15,my family was forced to leave our home for my grandfather's house several miles away. We spent the early part of that evening watching the hurricane draw closer on the Weather Channel. Around nine o'clock, a loud sound shook the house, turned over the roof and carried it off. Soon came an indoor rainstorm.

Realizing the damage, my grandfather began to be afraid. The storm had started, but he still ran out into the heavy rain and wind to see how much of the roof was left. We got him back inside. I had never seen him so scared. Mom finally asked him to lie down in his room.

The leak had progressed rapidly. It soon became a race against time to protect what was saved. Some people may think it necessary to save material things, but I hoped to save those items with emotional value, such as the photos. I still feared the storm, but I more feared the influence it brought.

The next morning, it started to clear up. Thankfully, my family weathered the storm, though the same could not be said for the house. Only the wooden beams remained, but inside many of his things were safe. My mom and I had worked tirelessly through the night.

It was late, but we were still unwilling to go to bed. We discussed the rebuilding of the house. Under the beautiful sky, we suggested looking after my grandfather more often in the future. After this disaster, I realized the truth that the hurricane itself was not so terrible if we loved each other.

1. Why do the people store full gas cans and bottled water?

A．To save much money.	B．To watch a hurricane easily.
C．To protect their houses well.	D．To be prepared for hurricanes.

2. How did the author's grandfather feel during the hurricane?

A．Frightened.

B．Surprised.

C．Calm.

D．Angry.

3. What does the underlined word "weathered" in paragraph 5 mean?

A．Prepared well for.	B．Waited patiently for.
C．Came safely through.	D．Suffered seriously from.

4. What may the author learn from the experience?

A．Family love is powerful.	B．Take things as they come.
C．Good health is over wealth.	D．Lost time is never found again.