1 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Facial surgery (手术) is a serious business, especially on children     1     are not yet fully grown but Melbourne researchers are developing a technique that could change the face of children’s surgery.

This new     2     (develop) will allow doctors to work out a child’s normal face shape at different ages to predict (预测) future growth.

Researchers at the Murdoch Children’s Research Institute (MCRI) could soon replace the ruler currently     3     (use) to track changes in a child’s head and face with 3D images. By     4     (improve) the ability to predict normal growth and future changes in a child’s face, doctors will be able to    5     (well) complete their surgery than before.

MCRI’s Mr Harold Matthews said current     6     (method), including using patients’ photographs and X-rays were slow. Together     7     researchers in Belgium, Mr Matthews is pioneering a new tool that provides averages (平均值) for normal growth of the face throughout childhood.

The project intends     8     (take) some of the guesswork out of surgery. For example, in children with Pierre Robin Sequence, a serious condition which means they are born with an underdeveloped jaw(下颚), some doctors choose to fix it early while others wait to see if the child’s face will     9     (natural) correct itself as it grows. Without this new technology,     10     is difficult to know which method is better for each child.

2 . The old saying that “laughter is the best medicine” may contain an element of truth when it comes to heart health. A research has demonstrated that laughing causes the tissue inside the heart to expand and increases oxygen flow around the body.

“Our study found that laughter treatment increased the functional capacity of the cardiovascular (心血管的) system, and patients with heart disease who engaged in a course of laughter treatment had reduced inflammation (炎症) and better health.” said the lead author, Prof Marco Safffi, of the Hospital de Clinicas de Porto Alegre in Brazil.

In the trial, scientists carried out a first-of-its-kind study to examine if laughter treatment could improve symptoms of patients with heart disease. It involved 26 adults with an average age of 64, all diagnosed with the heart disease caused by plaque (斑块) buildup in the walls of the arteries (动脉) that supply blood to the heart. Over three months, half were asked to watch two different hour-long comedy programmes each week, including funny popular sitcoms. The other half watched two different serious documentaries, about heavy topics such as politics or the Amazon rainforest.

At the end of the 12-week study period, the comedy group improved by 10% in a test measuring how much oxygen their heart could pump around the body. The group also improved in a second measure that tested how well arteries can expand. They also had a blood test to measure several inflammatory markers, which indicate how much plaque has built up in the blood vessels and whether people are at risk of heart attack or stroke. The results showed that their inflammatory markers had significantly reduced compared with the documentary group.

“When patients with heart disease arrive at hospital, they usually have a lot of inflammatory markers.” said Saffi. “It’s really good news that laughter treatment is a good intervention that could help reduce inflammation and decrease the risk of heart attack and stroke.”

1. How does laughter help patients with heart disease?

A．It makes the tissue inside the heart become larger

B．It lowers the oxygen flow around the patients’ body

C．It reduces the function of the cardiovascular system

D．It increases inflammation and results in better health

2. What can we infer from the research?

A．The research participants were all old man above 60.

B．The documentary group worried about the Amazon rainforest.

C．The comedy group must have laughed while watching sitcoms.

D．The comedy group had more inflammatory markers than the documentary group.

3. How many tests did the participants have at the end of the research?

A．2

B．3

C．4

D．5

4. What’s the best title of this article?

A．Laughter treatment — A powerful weapon to cure heart disease.

B．Laughter treatment —An effective method to defeat heart disease.

C．Laughter treatment —A helpful way to lower the risk of heart disease.

D．Laughter treatment — A perfect therapy to save lives from heart disease.

3 . Healthcare professionals in four Canadian provinces can now prescribe (开处方) their patients passes to National Parks thanks to a new program, PaRX, which stresses the health benefits of spending time in nature in helping to manage physical and mental health.

PaRx was founded by the B. C. Parks Foundation in November 2020 and was officially supported by Parks Canada last month. Health professionals who register (注册) with the program can offer their patients a Parks Canada Discovery Pass, making it the country’s “first national nature prescription program”. The Parks Discovery Pass typically costs about $57 per adult per year.

“We’re really asking doctors to prioritize patients who live close to Parks Canada sites so they’ll have more access and can make it part of their everyday lives, and also those for whom the cost of a pass might be a barrier to nature access,” said Melissa Lem, president-elect of the Canadian Association of Physicians for the Environment.

Studies have shown that spending time in nature has a range of health benefits—from lowering blood pressure and improving heart health to reducing stress and anxiety. PaRx recommends that patients spend at least two hours per week in the great outdoors, and at least 20 minutes each time, to get the most benefit.

The program is currently available in the Canadian provinces of British Columbia, Ontario, Saskatchewan, and Manitoba. It will eventually spread to every province.

PaRx also has benefits outside of the national parks, with many gardens offering free admission to visitors who show their prescriptions.

“There’s almost no medical condition that nature doesn’t make better. Rediscovering nature and then realizing how important it is to us has really shown that nature-health connection,” Lem said.

1. What do we know about the Parks Discovery Pass?

A．It is low priced.	B．It is designed for poor families.
C．It is well received.	D．It is owned by registered doctors.

2. What does PaRx plan to do about the program next?

A．Improve its service quality.	B．Carry it out all over the country.
C．Do further research on its effect.	D．Make it available free of charge.

3. What does Melissa Lem stress in the last paragraph?

A．Nature matters a great deal to our health.

B．Not all patients can get treated by doctors.

C．People should learn to change their lifestyle.

D．People should place health above everything.

4. Which of the following can be the best title for the text?

A．Canadians Are Living in Harmony with Nature

B．Canadians Are Trying to Get Away from Hospitals

C．Canadian Doctors Are Prescribing National Park Visits

D．Canadian Doctors Are Leading the Way in Medical Research

4 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

In 1951, a young mother of five named Henrietta Lacks visited The Johns Hopkins Hospital. Upon     1     (care) examination, the famous doctor Howard Jones discovered a large cervical tumor (宫颈肿瘤).

A small number of her cancer cells     2     (collect) during a medical test were sent to Dr. George Gey’s nearby lab. For years, Dr. Gey, a well-known cancer and virus researcher, had been collecting cells from all patients     3     came to The Johns Hopkins Hospital with cervical cancer, regardless of     4     (they) race or socioeconomic position, but each cell    5     (rapid) died in Dr. Gey’s lab. What Dr. Gey soon discovered     6     (be) that Mrs. Lacks’ cells were unlike any of the others he had ever seen: where other cells would die, Mrs. Lacks’ cells doubled every 20 to 24 hours.

Today, these incredible cells, named “HeLa” cells, are used for     7     (study) the effects of drugs and viruses       8     the growth of cancer cells without experimenting on humans. Scientists use “HeLa” cells to test the effects of radiation (辐射), to study the human genome, and to learn more about how viruses work. These cells also played     9     important role in the     10     (develop) of the polio vaccine (小儿麻痹症疫苗).