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 me, re-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.

21. Which of the following can replace the underlined word “courier” in

Paragraph 1?

A. provider                        B. delivery man

C. collector                       D. medical doctor

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

23. Which flight did the woman put Peter on first?
A. To London            B. To  Newark
C. To Providence           D. To Washington

A new collection of photos brings an unsuccessful Antarctic voyage back to life.

Frank Hurley’s pictures would be outstanding----undoubtedly first-rate photo-journalism---if they had been made last week. In fact, they were shot from 1914 through 1916, most of them after a disastrous shipwreck(海滩), by a cameraman who had no reasonable expectation of survival. Many of the images were stored in an ice chest, under freezing water, in the damaged wooden ship.

  The ship was the Endurance, a small, tight, Norwegian-built three-master that was intended to take Sir Ernest Shackleton and a small crew of seamen and scientists, 27 men in all, to the southernmost shore of Antarctica’s Weddell Sea. From that point Shackleton wanted to force a passage by dog sled(雪橇) across the continent. The journey was intended to achieve more than what Captain Robert Falcon Scott had done. Captain Scott had reached the South Pole early in 1912 but had died with his four companions on the march back.

   As writer Caroline Alexander makes clear in her forceful and well-researched story The Endurance, adventuring was even then a thoroughly commercial effort. Scott’s last journey, completed as he lay in a tent dying of cold and hunger, caught the world’s imagination, and a film made in his honor drew crowds. Shackleton, a onetime British merchant-navy officer who had got to within 100 miles of the South Pole in 1908, started a business before his 1914 voyage to make money from movie and still photography. Frank Hurley, a confident and gifted Australian photographer who knew the Antarctic, was hired to make the images, most of which have never before been published.

24. What do we know about the photos taken by Hurley?

   A. They were made last week

B. They showed undersea sceneries

C. They were found by a cameraman

D. They recorded a disastrous adventure

25. Who reached the South Pole first according to the text?

A. Frank Hurley                         B. Ernest Shackleton

C. Robert Falcon Scott                  D. Caroline Alexander

26. What does Alexander think was the purpose of the 1914 voyage?

A. Artistic creation                    B. Scientific research

C. Money making                         D. Treasure hunting

You probably know who Marie Curie was, but you may not have heard of Rachel Carson. Of the outstanding ladies listed below, who do you think was the most important woman of the past 100 years?

Jane Addams(1860-1935)

Anyone who has ever been helped by a social worker has Jane Addams to thank. Addams helped the poor and worked for peace. She encouraged a sense of community(社区)by creating shelters and promoting education and services for people in need In 1931,Addams became the first American woman to win the Nobel Peace Prize.

Rachel Carson(1907-1964)

If it weren’t for Rachel Carson, the environmental movement might not exist today. Her popular 1962 book Silent Spring raised awareness of the dangers of pollution and the harmful effects of chemicals on humans and on the world’s  lakes and oceans.

Sandra Day O’Connor(1930-present)

When Sandra Day O’Connor finished third in her class at Stanford Law School, in 1952,she could not find work at a law firm because she was a woman. She became an Arizona state senator(参议员) and ,in 1981, the first woman to join the  U.S. Supreme Court. O’Connor gave the deciding vote in many important cases during her 24 years on the top court.

Rosa Parks(1913-2005)

On December 1,1955,in Montgomery, Alabama, Rasa Parks would not give up her seat on a bus to a passenger. Her simple act landed Parks in prison. But it also set off the Montgmery bus boycott. It lasted for more than a year, and kicked off the civil-rights movement. “The only tired I was, was tired of giving in,” said Parks.

27. What is Jane Addams noted for in history?

A. Her social work.

B. Her lack of proper training in law.

C. Her efforts to win a prize.

D. Her community background.

28. What is the reason for O’Connor’s being rejected by the law firm?

A. Her lack of proper training in law.

B. Her little work experience in court.

C. The discrimination against women.

D. The poor financial conditions.

29. Who made a great contribution to the civil-rights movement in the US?

A. Jane Addams.                   B. Rachel Carson.    

C. Sandra Day O’Connor.          D. Rosa Parks

30. What can we infer about the women mentioned in the text?

A. They are highly educated.     B. They are truly creative.

C. They are pioneers.            D. They are peace-lovers.

Secret codes (密码)keep messages private。Banks, companies, and government agencies use secret codes in doing business, especially when information is sent by computer.

   People have used secret codes for thousands of years. _31_ Code breaking never lags(落后) far behind code making. The science of creating and reading coded messages is called cryptography.

   There are three main types of cryptography. _32_ For example, the first letters of “My elephant eats too many eels” Spell out the hidden message “Meet me.”

_33_ You might represent each letter with a number, For example, Let’s number the letters of the alphabet, in order, from 1 to 26. If we substitute a number for each letter, the message “Meet me” would read “13 5 20 13 5.”

   A code uses symbols to replace words, phrases, or sentences. To read the message of a real code, you must have a code book. _34  For example, “bridge” might stand for “meet” and “out” might stand for “me.” The message “bridge out” would actually mean “Meet me.” _35_ However, it is also hard to keep a code book secret for long. So codes must be changed frequently.

A. It is very hard to break a code without the code book.
B. In any language, some letters are used more than others.
C. Only people who know the keyword can read the message.
D. As long as there have been codes, people have tried to break 

them.
E. You can hide a message by having the first letters of each 

word   spell it out.
F. With a code book, you might write down words that would stand 

for other words.
G. Another way to hide a message is to use symbols to stand for 

specific letters of the alphabet.

If you feel stressed by responsibilities at work, you should take a step back and identify (识别) those of   56  (great)and less importance. Then, handle the most important tasks first so you’ll feel a real sense of   57  (achieve). Leaving the less important things until tomorrow   58  (be) often acceptable.

Most of us are more focused   59   our tasks in the morning than we are later in the day. So, get an early start and try to be as productive   60   possible before lunch. This will give you the confidence you need to get you through the afternoon and go home feeling accomplished.

Recent   61  (study) show that we are far more productive at work if we take short breaks   62  (regular). Give your body and brain a rest by stepping outside for   63   while, exercising, or doing something you enjoy.

If you find something you love doing outside of the office, you’ll be less likely   64  (bring) your work home. It could be anything-gardening, cooking, music, sports—but whatever it is,   65  (make) sure it’s a relief from daily stress rather than another thing to worry about.