I am Tony, a volunteer stem cell courier. Sin...

I am Peter Hodes, a volunteer stem courier. Since March 2012, I've done 89 trips of those , 51 have been abroad, I have 42 hours to carry stem cells（干细胞）in my little box because I've got two ice packs and that's how long they last, in all, from the time the stem cells are harvested from a donor(捐献者) to the time they can be implanted in the patient, we’ve got 72 hours at most, So I am always conscious of time.

I had one trip last year where I was caught by a hurricane in America. I picked up the stem cells in Providence, Rhode Island, and was meant to fly to Washington then back to London. But when I arrived at the check-in desk at Providence, the lady on the desk said: “Well, I’m really sorry, I’ve got some bad news for you-there are no fights from Washington.” So I took my box and put it on the desk and I said: “In this box are some stem cells that are urgently needed for a patient-please, please, you’ve got to get me back to the United Kingdom.” She just dropped everything. She arranged for a flight on a small　 plane to be held for mere-routed(改道)me through Newark and got me back to the UK even earlier than originally scheduled.

For this courier job, you’re consciously aware than that box you’re got something that is potentially going to save somebody’s life.

1.Which of the following can replace the underlined word “courier” in Paragraph 1?

A.provider B.delivery man

C.collector D.medical doctor

2.Why does Peter have to complete his trip within 42 hours?

A.He cannot stay away from his job too long.

B.The donor can only wait for that long.

C.The operation needs that very much.

D.The ice won’t last any longer.

3.Which flight did the woman put Peter on first?

A.To London B.To Newark

C.To Providence D.To Washington

高二英语阅读理解中等难度题查看答案及解析

I am Tony, a volunteer stem cell courier. Since March 2019, I have done 99 trips——of those, 56 have been abroad. I have 42 hours to carry stem cells in my little box because I've got two ice packs and that's how long they last. In all, from the time the stem cells are harvested from a donor to the time they can be implanted (移植) in the patient, we've got 72 hours at most. So I am always conscious of time.

Last year, I had a trip where I was caught by a hurricane in America. I picked up the stem cells in Providence, Rhode Island, and was meant to fly to Washington then back to London. But when I arrived at the check -in desk at Providence, the lady on the desk said: "Well, I'm really sorry, but I've got some bad news for you - there are no flights to Washington." So I took my box and put it on the desk and I said: "In this box are some stem cells that are urgently needed for a patient- please, please, you've got to get me back to the United Kingdom." She just dropped everything. She arranged for a fight on a small plane to be held for me, rerouted (改道) me through Newark and got me back to the UK even earlier than originally scheduled.

For this courier job, I' m consciously aware that in that box I've got something that is potentially going to save someone’s life.

1.What does the underlined word "courier" mean in paragraph !?

A.provider. B.collector. C.delivery man. D.medical doctor.

2.Why does Tony have to complete his trip within 42 hours?

A.The operation needs that much time.

B.The donor can only wait for that long.

C.He can't stay away from his job too long.

D.The ice can only last such a period of time.

3.Why did the woman arrange a new flight for Tony?

A.To help save a patient. B.To avoid being hit by Tony.

C.To get the stem cell. D.To drop everything.

4.What does the author think of his job?

A.Tiresome. B.Interesting. C.Meaningless. D.Significant.

高二英语阅读选择简单题查看答案及解析

Research on embryonic stem cells (胚胎干细胞) is debatable because it requires the destruction of live human embryos.

Supporters find it easy to minimize the significance of this fact because the embryos are only a few days old—nothing more than “blastocysts (胚泡)”.

But if it’s OK to destroy 5-day-old embryos to further scientific inquiry, is it OK to destroy embryos that are five weeks old? Five months? Eight months? Science can’t answer that question.

You don’t have to be part of the pro-life group to have concerns about this kind of scientific research. James Thomson, the University of Wisconsin biologist has said, “If human embryonic stem cell research does not make you at least a little bit uncomfortable, you have not thought about it enough.” However, the president’s new order suggests we should not think too much.

Recently, supporters of embryonic stem cell research called on president to allow experiments using “surplus (多余的)” fifty frozen embryos in fertility clinics, arguing that they would be disposed of anyway. But Obama didn’t limit his new policy to these fertilized eggs.

On the contrary, he left open the possibility of funding studies using embryos created specifically so their cells can be harvested. He did, however, reject another option. “We will ensure,” he said, “that our government never open the door to the use of cloning for human reproduction. It is dangerous, profoundly wrong and has no place in our society, or any society.”

But this position is hard to square with his claimed approach. On one hand, the president says his policy is “about letting scientists do their jobs, free from pressure”. On the other, he will use pressure to keep them from doing reproductive cloning.

What this policy means is simple: It may be permissible for scientists to create cloned embryos and kill them. It’s not permissible to create cloned embryos and let them live. Their cells may be used for our benefit, but not for their own.

It’s the policy that is risky not just to days-old human embryos. The rest of us are sure to receive important medical benefits from this research one day. But we may lose something even more important in a moral sense.

1.It’s implied in the fourth paragraph that pro-life group ________.

A. support the research on embryonic stem cells

B. don’t agree with any kind of scientific research

C. agree with James Thomson’s opinion

D. rarely think of the consequences of embryonic stem cell research

2.The underlined phrase “square with” in the passage is closest in meaning to ________.

A. find a square tool for                B. be in line with

C. quarrel with                            D. pay off

3.Which of the following statement is TRUE according to the passage?

A. The author thinks there’s a big difference between a 5-day embryo and a 8-month embryo.

B. In Obama’s policy, embryonic researchers can only use surplus embryos in fertility clinics.

C. President Obama hasn’t expressed his attitude toward human reproductive cloning.

D. The research on embryonic stem cells may bring people medical benefits in the future.

4.The author thinks the policy is worrying because ______.

A. the research is against the law

B. we may suffer morally for the research

C. scientists are not really working without pressure

D. ban on human cloning is in the long run harmful to human development

高二英语阅读理解中等难度题查看答案及解析

Scientists have created the world's first living, self-healing robots using stem cells (干细胞) from frogs. Named xenobots after the African clawed frog from which they take their stem cells, the ''machines'' are less than a millimeter wide — small enough to travel inside human bodies. They can walk and swim, survive for weeks without food, and work together in groups. ''These are entirely new life forms, '' said the University of Vermont, which conducted the research with Tufts University's Allen Discovery Center.

The researchers removed living stem cells from frog embryos (胚胎), and left them to hatch. Then, the cells were cut and reshaped into specific ''body forms'' designed by a supercomputer — forms ''never seen in nature''，according to a news release from the University of Vermont.

Xenobots even have regenerative abilities. When the scientists sliced into one robot, it healed by itself and kept moving. They don’t look like traditional robots - they have no shiny clothing or robotic arms. Instead, they look more like a tiny drop of moving pink flesh. The researchers say this is deliberate — this ''biological machine'' can achieve things typical robots of steel and plastic cannot. ''Traditional robots degrade over time and can produce harmful ecological and health side effects, '' researchers said in the study. ''As biological machines, xenobots are more environmentally friendly and safer for human health.''

According to the researchers, these robots could be used to clean up radioactive waste, collect microplastics in the oceans, or even carry medicine inside human bodies. Aside from these immediate practical tasks, they could also help researchers to learn more about cell biology - opening the doors to future advancement in human health and longevity. This sounds like something from a sci-fi movie. Some people even voiced their concern that humans might be taken control of by those xenobots. However, the researchers in the study say there is no need for alarm. They can't reproduce or evolve (进化).

1.What is this passage mainly about?

A.The advantages of a medical robot.

B.The application of robots in biology.

C.The general introduction of a living robot.

D.The medical value of African clawed frogs.

2.The underlined word ''regenerative'' in Paragraph 3 probably means ''________''.

A.living longer B.growing again

C.replacing old cells D.defending against attacks

3.What can we know about xenobots?

A.They can do everything that traditional robots can.

B.They can break up steel and plastic while degrading.

C.They are able to cure people of all kinds of diseases.

D.They are harmless to the environment and human health.

4.What is the researchers' attitude to the development of xenobots?

A.Doubtful. B.Positive.

C.Cautious. D.Casual.

高二英语阅读选择困难题查看答案及解析

Since you have had your cell phone _____ , you don’t need to borrow mine.

A. repairing         B. to repair          C. repaired               D. repair

高二英语单项填空中等难度题查看答案及解析

Since Shanghai won the right to host the World Expo, over half a million people have volunteered to ___________in all the Shanghai Expo projects .

高二英语单项填空简单题查看答案及解析

Since our school does not employ full-time librarians, the library ________ is usually run by volunteers with special responsibilities for library work.

A. principle　　 B. collection　　 C. application　　 D. personnel

高二英语单项填空中等难度题查看答案及解析

I’ve been a volunteer at Radio Lollipop since May. It is one of the best experiences that I 1.(have) in the last few years.

Radio Lollipop is an international charity organization 2.(found) in 1979 to provide care, comfort, games and entertainment for children in hospital. The service is provided 3.(entire) by volunteers who have been specially selected and trained to make a child’s stay in hospital more interesting and 4. (little) frightened

I help out regularly 5. Monday evenings after work at the Royal Hospital. My task is to deliver a smile to the children at the wards (病房) 6.might be there for a few days or even a couple of months. 7.is hard to find children on Monday, as the cinema at the hospital is open on that day. Most of them tend 8.(be) there.

I am thankful for this opportunity to help children at the hospital and make their stays more pleasant. The experience also helps me deal with the 9.(difficulty) and challenges that I’ve been faced with in my own life. I am now more positive in helping others and realize 10. everyone goes through some pain and suffers from time to time.

高二英语七选五中等难度题查看答案及解析

On March 10, 2019, eight-year-old Tanitoluwa ''Tani'' Adewumi defeated 73 young competitors to win the New York State Scholastic Chess Championship in his age group — kindergarten to third grade — with five wins and one draw. While the achievement is remarkable in itself, what is even more so is that the youngster, who was homeless at the time, began learning the game less than a year ago.

Tani and his family arrived in New York City from Nigeria in 2017, seeking religious protection. A church pastor(牧师)helped find the family of four space in a homeless shelter in Manhattan and, soon after, Tani entered the local elementary school. It was here that the young talent was first introduced to the basics of chess by a part-time teacher. Attracted by the game, the then seven-year-old begged his mother, Oluwatoyin, to allow him to join the school's chess club. The family were concerned that they would be unable to afford the fees and expenses, which add up to thousands of dollars due to travel and chess competition admissions, Oluwatoyin emailed chess instructor Russell Makofsky, who ran the club. To her surprise and delight, Makofsky agreed to waive all costs for young Tani. The rest, as they say, is history. The young boy, who has got seven prizes in less than a year, currently ranks 27 in America in his age group.

Though the chess club certainly helps, Tani's success can be largely owed to the efforts he has put into the game. The chess talent practices the game for several hours a day either on the floor with his board, or online, using his dad’s laptop. Every Saturday, Tani and his mother head to Harlem for a free 3-hour class to help further sharpen his game skills.

Not surprisingly, Tani's incredible story, first reported by The New York Times, has resulted in an outpouring of support from the American public. Shortly after the young boy won the New York State Championship, Makofsky began a GoFundMe campaign for Tani and his family to ''secure a home where he can continue on his journey''.

And the heartwarming story gets even better! Since they now have a home, the family have decided to ''pay it forward'' and donate the over $200,000 collected on GoFundMe to African immigrants in America who are struggling the way the family was.

1.What made Tani's achievement especially remarkable?

A.His young age B.His quick learning

C.Support from his family D.Help from his teacher

2.What does the underlined part ''to waive all costs for young Tani'' in Paragraph 2 mean?

A.To pay for Tani's schooling. B.To raise money for Tani's family.

C.To teach Tani free of charge. D.To spend more on Tani’s training.

3.What's paragraph 3 mainly about?

A.Success of Tani. B.Activities of the chess club.

C.Tani's devotion to the game. D.Public reaction to Tani's story.

4.What does the last paragraph tell us about the family?

A.They are caring. B.They live in poverty.

C.They are honest. D.They are pitiful.

高二英语阅读理解困难题查看答案及解析

Here are Important Travel Notices from United Airlines, March 20, 2016 7:12 AM. Information is updated as it is received.

1. Travel and the Zika virus

If you have a ticket for travel to a country affected by the Zika virus(as listed on the CDC website) and have concerns, please contact the United Customer Contact Center with any questions or changes to your reservation. Customers advised to avoid the affected regions based on CDC guidance may change their destination or travel date without a fee or may choose to receive a refund(退款) if their tickets were booked before February 29,2016. The new travel date must be within the validity of the ticket. Additional charges may apply if there is a difference in fare for the new travel route.

2. Longer lines at security checkpoints

Procedural changes at TSA checkpoints throughout the United States may result in longer lines at security checkpoints. Please plan accordingly and allow for extra time at the airport. The TSA advises arriving at the airport two hours before your flight for US travel and three hours before for international travel. To save time at security, we encourage you to visit www.tsa.gov.com and apply for TSA pre-check.

3. Notice for flight departing the European Union, Norway and Switzerland

EU Regulation 261/2004 requires airlines to provide the following notice: If you are not allowed to board or if your flight is canceled or delayed for at least two hours, ask at the check-in counter or boarding gate for the form, stating your rights, particularly about compensation assistance.

1.Travelers have to pay additional fees when they want to _____.

A. change their reservation

B. change travel date

C. receive their refund

D. change to a dearer route

2.What do we know from Notice 2?

A. Security check possibly takes time in the USA.

B. Security checkpoints are not available.

C. Security check wastes a long time.

D. Pre-check can easily be done online.

3.Compensation can be asked for when _____.

A. passengers refuse to board the plane

B. passengers trips canceled in advance

C. passengers' flight is delayed at least two hours

D. passengers miss their flight due to traffic jam

高二英语阅读理解中等难度题查看答案及解析