1 . Animals are natural resources that people have wasted all through our history. Animals have been killed for their fur and feathers, for food, for sport, and simply because they were in the way. Thousands of kinds of animals have disappeared from the world forever. Hundreds more are on the danger list today. About 170 kinds in the United States alone are considered in danger.
Why should people care? Because we need animals. And because once they are gone, there will never be any more.
Animals are more than just beautiful and interesting. They are more than just a source of food. Every animal has its place in the balance of nature. Destroying one kind of animal can create many problems.
For example, when farmers killed large numbers of hawks(老鹰), the farmers stores of corn and grain were destroyed by rats and mice. Why? Because hawks eat rats and mice. With no hawks to keep down their numbers, the rats and mice multiplied quickly.
Luckily, some people are working to help save the animals. Some groups raise money to let people know about the problem. And they try to get the governments to pass laws protecting animals in danger.
Quite a few countries have passed laws. These laws forbid(禁止)the killing of any animals or plants on the danger list. Slowly, the number of some animals in danger is growing.
1. What is the best title for the passage?| A．Save the Animals | B．Useful Animals |
| C．Laws for Animals | D．Animals in Danger |
| A．they give us a source of food | B．they are beautiful and lovely |
| C．they give us a lot of pleasure | D．they keep the balance of nature |
| A．Became more | B．Became less |
| C．Turned black | D．Ate food |
| A．people have known the importance of animal protection a long time ago |
| B．the number of hawks is on the decrease |
| C．animals play an important role in people’s life |
| D．many countries passed laws forbidding the killing of any animal |
2 . Nobody needs reminding that exercise is good for our health, but we may need reminding that it needs to be done in the right way.
Light exercises are a great way to improve circulation and keep our muscles active, especially if the rest of the day will be spent sitting in front of a computer or in a lecture hall. However, certain sports like long distance running require training to build up our bodies so they can handle the challenge. If we go into such sport cold, it can shock our muscles, hearts, lungs, and other organs and cause severe pain or in some cases, even death.
Some people are born with medical conditions that go unnoticed until they stress the unstable part of their body. A weak heart may never be seen until we do something that causes extreme physical effort. Recently there have been cases of people dying while running long distances. Also, a university student died after taking a 1.000m running exam. Some universities and high schools have cut long distance races (i.e. 3.000m, 5,000m) from their campus sports games, partly because of the supposed danger and partly because they say fewer people are entering such events.
Maybe education about such events is lacking, especially during primary and high school. People participating in such competitions should realize that a reasonable amount of training is required beforehand and having a medical check is wise, especially for a marathon. People shouldn’t be forced to participate in events that push them past their limits, especially if they haven’t warmed-up completely. Cancelling events could lead to people becoming less healthy and overweight. Maybe these events shouldn’t be cancelled, but organizers and participants should be more careful about regular health checks.
1. Why does the author write the text?| A．To give us some reminding on exercises. |
| B．To persuade us to take less sports. |
| C．To advise students to have regular exercises. |
| D．To require cancelling long distance running. |
| A．Having trained a lot. | B．Without any preparation. |
| C．Having a low temperature. | D．In an unfriendly way. |
| A．Because no students are willing to enter such events. |
| B．Because the students’ physical conditions are too poor to finish them. |
| C．Because long distance running is not fit for students. |
| D．Because they worry about the supposed danger in such races. |
| A．Have a medical check and warm-up exercises. |
| B．Push ourselves past our limits. |
| C．Participate in it confidently. |
| D．Try to lose some weight first. |
3 . AIDS may be one of the most undesirable diseases in the world. Luckily, there is now hope for AIDS patients.
According to a recent paper published in the New England Journal of Medicine，Chinese scientists have successfully used CRISPR technology -a method of gene editing-to treat a patient with HIV. While it may not have cured the patient fully, it still represents a huge step forward in fighting the disease.
The patient was a 27-year-old Chinese man who was diagnosed with both AIDS and acute lymphoblastic leukemia (淋巴母细胞白血病), a type of blood cancer. Despite his bleak situation, doctors offered him a little hope: a bone marrow (骨髓) transplant to treat his cancer and an experimental treatment for his HIV. They used this chance to edit the DNA in bone marrow stem cells (干细胞) from a donor before transplanting the cells into the patient.
Specifically, the treatment involved using the gene-editing tool CRISPR-Cas9 to delete a gene known as CCR5, which encodes (给…编码) a protein that HIV uses to get inside human cells. Without the gene, HIV is unable to enter cells. Talking about the gene, lead scientist Deng Hongkui told CNN, “After being edited, the cells and the blood cells they produce have the ability to resist HIV infection.” Nineteen months after the treatment, the patients leukemia was in complete remission( 缓 解 ) and donor cells without CCR5 remained, according to the research paper.
Though the transplant didn't cure the man’s HIV, it still showed the effectiveness of gene-editing technology, as there was no indication of any unintended genetic changes-a major concern with past gene-editing treatment experiments. Amesh Adalja, a senior scholar at the Johns Hopkins Center for Health Security in the United States, who was not involved in the study, praised the treatment. “They did a very creative experiment, and it was safe,” he told Live Science. “It should be viewed as a success.”
Deng believes gene-editing technology could “bring a new dawn” to blood related diseases such as AIDS and sickle-cell anaemia ( 镰 状 细 胞 贫 血 ). “Thanks to this new technology, the goal of a functional cure for AIDS is getting closer and closer,” he said.
1. The underlined word “bleak” in Paragraph3 probably means “______”.| A．hopeless |
| B．unstable |
| C．embarrassing |
| D．unique |
| A．By identifying and killing HIV. |
| B．By changing the structure of HIV. |
| C．By preventing HIV entering cells. |
| D．By removing a protein HIV feeds on. |
| A．Gene-edited cells are able to resist HIV infection. |
| B．The number of cells infected by HIV has decreased. |
| C．CCR5 and other genes in the patient's cells are changed. |
| D．Unintended genetic changes have taken place in the patient's cells. |
| A．It pointed out the problems of gene treatment. |
| B．It provided a new way to cure AIDS patients fully. |
| C．It could offer a safe treatment for blood-related diseases. |
| D．It was the first example to use gene-editing tool to treat AIDS. |
4 . A new study has shown how computers and robots powered by artificial intelligence can read human eye movements to “read” human personalities.
The eyes, they say, are the windows to the soul. And if that is true, computers and robots powered by sophisticated(复杂的) artificial intelligence algorithms(算法) may soon have the ability to peer into your soul. That is the result of a new study on the connection between eye movements and personality, conducted by neuroscience researchers based at the University of South Australia and Published in the scientific Journal Frontiers in Neuroscience.
“Eye movements during an everyday task predict aspects of our personality,” wrote the researchers, led by University of South Australia neuroscientist Tobias Loetscher, whose team follows 42 study subjects around the university campus recording their eye movements, then determines their personality traits(特点) with “well-established questionnaires” for determining personality type, according to a summary of the study published by the site Science Daily.
The researchers fed the data into their AI algorithms and found that computers running the algorithms were able to record human eye movements and immediately determine a person’s major personality traits, such as “neuroticism, extraversion(外向), agreeableness, conscientiousness, as well as perceptual(感知的) curiosity”, the scientists wrote.
“The new findings could improve the way human beings interact with their computers and other high-tech devices, even robots, allowing for more natural and realistic social interactions with machines,” Loetscher said.
“People are always looking for improved, personalized services. Today’s robots and computers are not socially aware so they cannot adapt to non-verbal information,” Loetscher said in a statement quoted by Indian Express. “This research provides opportunities to develop robots and computers so that they can become more natural, and better at interpreting human social signals.”
The study revealed previously undiscovered relations between specific personality characteristics and specific eye movement tendencies, according to a summary in Britain’s Daily Mail newspaper.
1. What do the underlined words “peer into” in Paragraph 2 probably mean?| A．understand | B．stare at |
| C．search for | D．concern about |
| A．It was carried out in a lab. |
| B．42 subjects’ eye movements were recorded. |
| C．The students’ daily movements were tracked. |
| D．Its subjects’ personalities were determined by computer. |
| A．Robots and computers are socially conscious. |
| B．People care less about improved, personalized services. |
| C．Today’s robots and computers can accustom to non-verbal information. |
| D．The discovery will improve the interaction between human beings and machines. |
| A．Human Personality Traits |
| B．What Human Eye Movements Are |
| C．Tell Personalities by Eye Movements |
| D．How Humans and Machines Interact |
5 . Eating too much fatty food, exercising too little and smoking can raise your future risk of heart disease. But there is another factor that can cause your heart problems more immediately：the air you breathe.
Previous studies have linked high exposure (暴露) to environmental pollution to an increased risk of heart problems，but two analyses now show that poor air quality can lead to heart attack or stroke (中风) within as little as a few hours after exposure. In one review of the research, scientists found that people exposed to high levels of pollutants (污染物) were up to 5% more likely to suffer a heart attack within days of exposure than those with lower exposure. A separate study of stroke patients showed that even air that the U. S. Environmental Protection Agency (EPA)considers to be of “moderate” (良好) quality and relatively safe for our health can raise the risk of stroke as much as 34% within 12 to 14 hours of exposure.
The authors of both studies stress that these risks are relatively small for healthy people and certainly modest compared with other risk factors such as smoking and high blood pressure. However, it is important to be aware of these dangers because everyone is exposed to air pollution regardless of lifestyle choices. So stricter regulation by the EPA of pollutants may not only improve environmental air quality but could also become necessary to protect public health.
1. The text mainly discusses the relationship between ________.| A．heart problems and air quality |
| B．heart problems and exercising |
| C．heart problems and smoking |
| D．heart problems and fatty food |
| A．relatively high | B．extremely low |
| C．relatively low | D．extremely high |
| A．Eating fatty food has immediate effects on your heart. |
| B．The EPA conducted many studies on air quality. |
| C．Moderate air quality is more harmful than smoking. |
| D．Stricter regulations on pollutants should be made. |
| A．inform | B．persuade |
| C．describe | D．entertain |
