Have you heard of snake robots? Scientists and doctors are already using tiny snakes that coil through the human body armed with sharp surgical tools to perform operations on hearts, prostate cancer, and other diseased organs. The snake robots that carry tiny cameras, scissors and forceps, and even more advanced sensors are being developed.

The next generation of the robots will be wireless, and will explore inside your body on their own--- not attached to any cables. For now, they are powered by cables that humans control. Experts say the day is coming when some robots will roam around the body on their own. But the experts in robotics say the new creations work best when they are designed for very specific tasks.

Howie Choset has been researching and building robots, particularly snake robots. He believes that his snake robot and others like it can help reduce medical costs by making complex surgery faster and easier. Choset says his new design is smaller and more flexible than earlier models.

The size of surgical robots allows surgeons to operate with far less damage to the body, helping the patient heal faster. Choset has also built larger snake robots designed for search and rescue, or just exploration. They can climb poles and trees and then look around through a camera in the head and slither through places that humans cannot reach.

“ We sent our snake robots into these caves in the Red Sea to look for evidence of ancient Egyptian ships,” he said. “ To me, archeology is like search and rescue, but everyone has been dead for 5,000 years.”

The doctors are very excited about the potential for surgical robots to do things that humans can’t do. The variety of sensors available for surgical robots keeps expanding. As they get smaller, maybe one day they will be able to test chemicals or blood in the body, or even the electrical connections in nerves.

1.What can we learn from the first paragraph?

A．The doctors carry out surgery using snake robots mainly for heart disease.

B．The doctors are very satisfied with the new snake robots during surgery.

C．Snake robots are completely free of human control today.

D．Other supplementary appliances will be added to snake robots.

2.Which of the following is true, according to the passage?

A．Snake robots are only used in the medical field.

B．Snake robots can reduce the patients’ medical costs.

C．Scientists are uncertain about the prospects for snake robots.

D．Scientists are forced to spend a lot of time researching snake robots.

3.How can snake robots work best, according to the passage?

A．When they carry tiny cameras, scissors and forceps.

B．When they are operated by experienced doctors.

C．When they are given a wireless function.

D．When they are designed for particular tasks.

4.Why do we know about Howie Choset, according to the passage?

A．He thought snake robots of different sizes can be used for different types of surgery.

B．He thought patients’ pain had been slightly reduced with the help of snake robots.

C．He also made snake robots for search, rescue and exploration.

D．He is very interested in researching ancient Egyptian ships.

5.The writers attitude towards the new technology is ______.

A．optimistic         B．doubtful           C．objective          D．negative

 

It was with the help of the local guide________ the mountain climber was rescued.

A. how          B. who           C. when         D. that 

 

 

．Several hours later, with the help of the police , the students managed to escape from the dangerous place, ______．

A．hungry and frightened                         B．hungrily and frightening

C．hungry and frightening                          D．hungrily and frightened

 

It’s impossible to determine how many people would have lost their lives without the contribution of African-American inventor Dr Charles Drew.

Charles Drew was born on June 3, 1904, in Washington, DC. His early interest was in education, but he was also an outstanding athlete. While in college, he was awarded as the man who contributed the most to sports during his four years in school. Drew’s sister Elsie suffered from tuberculosis(肺结核) and died in 1920. Her death influenced his decision to study medicine.

After becoming a doctor and working as a college instructor, Drew went to Columbia University, where he earned his Doctor of Medical Science degree. During this time he became involved in research on blood and blood transfusions.

At Columbia, he wrote a paper on “banked blood”, in which he described a technique he developed for the long-term preservation of blood plasma. Before his discovery, blood could not be stored for more than two days because of the rapid breakdown of red blood cells. Drew had discovered that by separating the plasma from the whole blood and then refrigerating them separately, they could be combined a week later for a blood transfusion. Drew became the first African American to receive a PhD in medical science.

After World War II broke out, Drew was called upon to put his techniques into practice. He was named a project director for the American Red Cross but soon quit his post after the government issued an order that blood taken from white donors should be separated from that of black donors.

On April 1, 1950, after he attended the annual free clinic at the John A. Andrew Memorial Hospital, he and other three physicians decided to drive back home. As he was tired from spending the night before in the operating room, he lost control of his car. Drew was badly injured and was taken to Alamance General Hospital in Burlington, North Carolina. He was pronounced dead half an hour after he first received medical attention. Drew's funeral was held on April 5, 1950, at the Nineteenth Street Baptist Church in Washington, DC.

But contrary to popular thought, he was not refused a blood transfusion by an all-white hospital. He indeed received a transfusion but was beyond the help of the doctors attending to him. As Dr. John Ford, one of the doctors who survived the accident, later explained, “We all received the very best of care. The fact that he was a Black did not in any way limit the care that was given to him.” Over the years, Drew has been considered one of the most honored figures in the medical field.

1.According to the passage, ________ might have contributed to the invention of blood banks.

A．the combination of blood cells

B．the rapid breakdown of red blood cells

C．the development of refrigerating technique

D．the technique of separating plasma from the whole blood

2.By saying “contrary to the popular thought” in the last paragraph, the writer _______.      

A．can’t understand the doctors’ decision

B．indicates his concern about the popular thought

C．feels disappointed with the all-white hospital

D．means what the doctors did was out of expectation

3.We can learn from the passage that Dr Charles Drew is best remembered by people as _______.       .

A．an outstanding athlete                   B．a college instructor

C．a medical researcher                    D．a project director

4.What conclusion can we draw from the passage?

A. Charles Drew died in a medical accident.

B. African Americans were still treated unfairly in the 1940s.

C. Charles Drew was the first African American to receive a PhD.

D. Physicians refused to give Charles Drew medical attention because he was a black.

5.In which section of a magazine can we most probably find the passage?

A．People           B．Health            C．Culture           D．Entertainment

 

Justin Bieber used to be an ordinary Canadian boy, but his life totally changed in 2008. With his great musical talent, this seventeen-year-old boy has become a superstar in the music industry.

Justin Drew Bieber was born in 1994 in Stratford, Ontario and was raised by his single mother. Bieber learned to play musical instruments when he was very young. In 2007, he took part in a local singing competition in his hometown, and he did it just for fun. He never took singing lessons before but surprisingly he placed second in the competition. Then, with the help of his mother, he uploaded (上传) videos of him singing on a website and they successfully attracted the attention of thousands of viewers. His videos got popular through word of mouth and some of them have received up to 10,000,000 views.

Justin Bieber would have never gotten a career in the music business without his videos. Scooter Braun, a former marketing executive (主管) of So So Def Recordings, had watched Bieber’s videos and he was impressed by the boy’s talent. Braun then contacted Bieber and he flew the boy into Atlanta seven months after the first video was posted. Bieber showed his talent in singing as well as his ability in playing musical instruments. He then got a record deal.

In 2009, Justin Bieber released (发行) his first single “One Time” while he was recording the debut album (首张专辑). The single “One Time” tells a story about love. This song had success not only in Canada and the US, but also in the international market. Then he released his debut album “My World 2.0” in 2010 and the song “Baby” became the lead single. This album successfully entered the Top Ten Charts in seven countries. In June 2010, he started his first world tour in Hartford, Connecticut. One month later, he started recording his second album.

1.Justin Bieber’s career in music began to take off when _____.

A．he met with Scooter Braun

B．he released his debut album

C．he won second place in a competition

D．his singing videos were uploaded to a website

2.It can be inferred from the text that Justin Bieber _____.

A．owed his success to good luck

B．showed a gift for music when he was young

C．is the youngest superstar ever in the music industry

D．released his debut album with the help of Scooter Braun

3.What do we learn about Justin Bieber’s “One Time” according to the text?

A．It is about love and was released in 2010.

B．It attracted the world’s attention after released.

C．It successfully entered the Top Ten Charts in seven countries.

D．It is the lead single of his debut album “My World 2.0”.

4.What is the best title for the text?

A．Justin Bieber’s journey to success

B．Lucky boy — Justin Bieber

C．What made Justin Bieber a singer?

D．Secrets of Justin Bieber’s success