The little girl is now 14 months old and should weigh at least 20 pounds. Yet she is still the size of a newborn baby, only reaching just over 7 pounds and a mere 19 inches.

Suraya has been examined by a whole team of experts in different fields. But doctors still have no idea why she refuses to grow, describing her condition as a “real mystery”. Experts have carried out all kinds of tests on her to find out what could be wrong with her. However, so far these have brought no optimistic results.

Her mother described that her daughter was like a real-life baby doll. “She cannot sit, talk or crawl and she has to be fed through a tube to keep her alive. But she just hasn’t been putting on any weight,” she said. “It’s very difficult because we don’t know what the future holds for Suraya. We hope the doctors will soon be able to find out the reason and that she will be able to live a normal life.”

Suraya was born four weeks earlier weighing 2.6 pounds. Experts say nine out of ten babies born at this stage will immediately start growing and put on weight. In Suraya’s case, she stayed at her birth weight for the first eight months and has only put on a small amount over the past six months.

Suraya has now been taken to London’s famous Great Ormond Street Hospital for further tests. Dr. Jide Menakaya said, “She is a very interesting little baby. Her case is highly unusual. For 17 years, I have certainly never seen anything like this. The fact that she still did not grow after we put the feeding tube directly into her veins (静脉) was unexpected and surprised us greatly. This is incredibly rare (罕见的). Now we are working on a new theory, but more research needs to be carried out.”

【小题1】What’s the matter with Suraya?

A．She caught a kind of common illness.	B．She was born 14 weeks earlier.
C．She isn’t getting any bigger.	D．There’s something wrong with her brain.

【小题2】What’s the doctors’ attitude to Suraya’s case?

A．Excited and optimistic.	B．Surprised and puzzled.
C．Interested but helpless.	D．Puzzled and hopeless.

【小题3】What can we know about Suraya from the passage?

A．Suraya’s mother is worried about Suraya’s future.

B．Suraya is lovelier than other girls.

C．Suraya can’t recover from the illness.

D．Doctors have to try their best to help Suraya.

【小题4】It can be inferred from the passage that __________.

A．it’s certain that Suraya could never live long

B．doctors have made great progress in Suraya’s illness

C．Suraya will be able to live a normal life in the future

D．it’s hard to predict what will happen to Suraya

   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, a type of blood cancer. Despite his bleak situation, doctors offered him a glimmer of hope: a bone marrow (骨髓) transplant to treat his cancer and an experimental treatment for his HIV.

They edited the DNA in bone marrow stem cells 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 CCRS, which encodes 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 patient’s leukemia was in complete relief and donor cells without CCR5 remained, according to the research paper.

Though the transplant did not cure the man’s HIV, it still showed the effectiveness of gene-editing technology, as there was no indication of any unintended genetic alterations (改变) -a major concern with past gene therapy 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 innovative experiment, 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 anemia. Thanks to this new technology, “the goal of a functional cure for AIDS is getting closer and closer,” he said.

【小题1】How did the new treatment fight against HIV?

A．By preventing HIV from entering cells.	B．By changing the structure of HIV.
C．By removing a protein that HIV feeds on.	D．By identifying and killing HIV.

【小题2】What was the result of the treatment?

A．CCR5 and other genes in the patient’s cells were changed.

B．Some of the patient’s blood cells could resist HIV infection.

C．HIV could no longer get into the patient’s cells.

D．The donor cells without CCR5 disappeared finally.

【小题3】What do we know about the experiment?

A．It has provided an innovative way to cure AIDS patients.

B．It pointed out the problems of gene therapy for AIDS.

C．It’s the first experiment to use gene-editing technology to treat AIDS.

D．It could offer a safe treatment for blood-related diseases.

While I will explain a bit about the science of stress and relaxation a little later simple way to think about it is that our body 's stress response works like a car alarm. Keep us safe by warning us of the presence of danger in our immediate environment.
But instead of warning us with a loud and annoying sound，our body alarm system lets us know that something is wrong by creating changes in our neurochemistry (神经化学）.If you've ever expe­rienced pain in your stomach，periods of extreme anger, inability to focus or even insomnia (失眠），chances are your body was paying the price in those moments for the brain chemistry of stress.
So if it's so uncomfortable，why not just get rid of stress altogether?
This is not only impractical，it would be dangerous. Let's go back to the metaphor (比喻说法）of the car alarm. If the alarm is turned off altogether，the car is exposed to continual danger without there being any way of your knowing about it until it is too late. It would be like walking through the jungle without any fear signal in the presence of a poisonous snake or other dangerous animals — while it might feel “nice” to be so relaxed，your body actually needs the stress response not only to remind you of danger but also to offer extra adrenaline (肾上腺素) for your heart and extra blood  and oxygen for your arms and legs.
However，if the car alarm goes off at any time，someone just looks at the car with a bit of an attitude，and it becomes equally useless. Not only do we stop paying attention to it，but it begins to drive us and everyone around us becomes a little bit crazy. In the case of our bodies，walking around in a constant state of alarm also has some pretty alarming health consequences，which we will explore in greater depth in the next chapter.
【小题1】Our body's stress response is compared to a car alarm in that   .

A．they work all the time	B．they both give a signal
C．they work in the same way	D．they both produce a sound

【小题2】When our body alarm system works，    .

A．we feel calm

B．we feel excited

C．some changes happen in our brain

D．some changes happen in our heart

【小题3】What would happen if stress were got rid of completely?

A．We'11 be free of worries.

B．We'11 achieve a sense of safety.

C．We'11 reach a perfect state of mind.

D．We'11 fail to realize the possible danger.

【小题4】What's the purpose of giving the example of walking through the Jungle in Paragraph 4?

A．To show the harm of stress.

B．To show the effect of stress.

C．To explain the function of stress response.

D．To explain the necessity of stress response.

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

A new study has found that graduate students are six times more likely to show depression symptoms 【小题1】 the general population. Researchers led by Evans, a scientist, surveyed 2,279 students in 26 different 【小题2】 (country). Approximately 40% of the surveyed graduates scored middle 【小题3】 severe for anxiety. Nearly 40 percent of the surveyed graduates also showed signs of middle to severe depression. It’s not hard 【小题4】 (understand) why life as a master student can drive some people crazy. Long hours in researching, social loneliness and feelings of not being respected 【小题5】 (complete) can break even the most motivated persons among us. When this situation persists, the anxiety and depression can become part of their life. The relationship 【小题6】 their teachers is another aspect 【小题7】 can deeply influence a graduate student’s mental health. Among the graduates with anxiety or depression, only half agreed that their professional teachers 【小题8】 (provide) real help. These unbelievable high rates of anxiety and depression, when 【小题9】 (compare) to the general population, are alarming and should serve as 【小题10】 wakeup call for the academic world, expert Evans says.