None of our early ancestors could digest milk as adults because their bodies never had to ----milk drinking simply wasn’t an option. As people began to extract milk from animals, though, some people developed the ability to keep drinking it throughout their lives.

     Scientists now know of a milk-related mutation ( 变异) in our genes -- the chemical instructions for life that we carry in almost every cell in our bodies. People who have a mutated form of one particular gene can drink milk just fine. People without the mutation tend to get sick from milk.

     To figure out where, and possibly why, milk drinking started, some scientists have been looking at who has the milk-digesting mutation today. Patterns are striking.

     Most adults in Northern and Central Europe are able to digest milk -- and they do. Cheese and butter and other dairy products are popular in countries such as Sweden, Denmark, Germany and England. Because European settlers dominated North America, most people here can handle milk just fine, as well. That may explain why ice cream is such a popular dessert in the United States.

     In much of Africa, Asia and South America, on the other hand, people tend to avoid dairy products because they lead to diarrhea (腹泻) and other stomach problems. (That’s why you won’t typically find cheese on the menu at a Chinese, Japanese or Ethiopian restaurant.) Native

Americans are also unable to digest milk.

     Based on these genetic patterns, scientists have long thought that- milk drinking started inNorthern Europe, where dairy is an institution and the milk-digesting mutation is everywhere.

     A recent study painted a different picture. With a computer medal, Thomas and colleagues looked at the spread of the milk-drinking mutation, farming and other related factor. Working backward, the scientists concluded that the first milk-thinkers lived in Central Europe around what’s now Hungary about 7,500 years ago. The practice didn't start farther north, as scientists had thought before.

66. Which of the following is the proper order of events according to the passage?

    a. Their children were able to digest milk as adults.

    b. They got sick from the milk.

    c. Some people got a mutation in their genes.

    d. Some people tried drinking milk from animals.

    e. Some people started to drink milk from animals on a regular basis.

    A. c→d→b→e→a   B. d→e→b→c→a  C. d →b→e→c→a   D. e→d→b→c→a

67. Most people in the USA can digest milk because __________.

   A. they have strong stomachs              B. their ancestors were Europeans

   C. that’s where milk drinking stinted        D. farmers raise a lot of cows there

68. Which of the following is LEAST likely to appear on the menu in a Japanese restaurant?

A. Butter.          B. Vinegar.          C. Fish.               D. Beef.

69. Which of the following is the author most likely to agree with?

A. Milk drinking first started in Northern Europe.

B. Milk drinking first started in Central Europe.

C. North American Indians were able to digest milk.

D. Dairy products are very popular in North Korea.

70. The main focus of the scientists' research was ______________.

   A. mutation of human genes               B. development of the human stomach

   C. why milk drinking started              D. where milk drinking first started

Every means     , but none proved      .

Every country had its heroes. The heroes are the people that nation and especially the young peo­ple 21_____ . If you get a list of the 22   _____of a nation, it will tell you the potential (潜力）of the nation.
If today in America ’ you ask the high school students to list their heroes their 23____ would prob­ably divide into three groups. rHie first group of heroes would be the rock stars—the people 24 _____with rock music. There is no doubt that such people do have talent (天才）but one 25_____ if one should hold up rock stars as model. The rock stars too often are mixed with drugs and their personal life isnot all that — 26 ____  . The rock stars are rich and wear the latest fashion styles (时装）.However oneshould 27 _____more in a hero than such things as 28______ and fine clothes.
A second type of heroes for the American youth are sports stars. Again you have a person who has a great talent in one area_ 29 _____. However, too often the personal life of the sports star is a bit 30_____. Too frequently drugs and drinking are a part of 31_____ of the sports stars.
A third group of heroes are TV or movie stars. These people may have lots of 32___ ，tal­ent and are quite handsome. However ’ the personal life of too many actors is quite sad and should not be held up as a 33____  for young people.
Today，the rock stars，the sportsmen  and the actors 34____ have become the models of the youth in America. Really,do you hear a young person say that his 35____ is a doctor, a teacher or a scientist? These people are not 36____ and do not wear fashionable clothes. However, they are 37____ people who work hard to make the world a better place for everyone.
What is really sad is that the young try to 38____ their heroes. They like to wear the same clothes as theirs, if the heroes of today for the American youth are 39 ____only to rock stars, sportsmen and actors, the future does not look too 40_____ .

Every Christmas the giant tree in Rockefeller Center sparkles with thousands of lights. From the beginning, when construction workers raised the first one during the depths of the Depression, it has been a symbol of hope. Diana Abad, like most Americans, loved that tree.
In 1999, however, Diana was writing her will. The 33-year-old woman from Staten Island, New York, was diagnosed with leukemia(白血病）and wanted to put her things in order. Doctors told her she had nine months to live.
Her slim chance for survival lay in finding a bone marrow(骨髓）donor. The most likely source for a match is always among relatives -- but her family was tested and there was none.
Then one day in February 2000, she got a call from the hospital saying that out of the four million people enrolled in the National Marrow Donor Program Registry, there was only one match. The potential donor was thinking about it. In March the donor agreed, and the transplant procedure was scheduled for March 27.
On that day, a doctor came in with the marrow in a bag, and Diana remembers him saying: “This is it. If it doesn’t graft within four to six hours, nothing will bring you back.” Diana asked a priest (牧师）to give her last rite(祈祷）.
Almost immediately after the two-hour procedure, she felt stronger. Doctors told her it looked like the graft had taken.
Donors are anonymous, but when she was better, Diana sent a note through the Registry: “You don’t know the joy that I am experiencing,” she wrote. “I hope that one day we can meet and I can thank you in person.”
It was several months before the donor replied. At first he didn’t even give his name. He was 34-year-old David Mason, and he lived in Dedham, Massachusetts. But eventually the two exchanged phone numbers and began to talk.
Then unexpectedly and unannounced, he turned up at her door in Englishtown, New Jersey, on December 23. She says it was love at first sight. He says he didn’t feel it until they met the second time.
That meeting began a long-distance romance that culminated(修成正果）under the Christmas tree in Rockefeller Center in December 2004. That’s where David proposed(求婚）to Diana. She, of course, said yes.
64．Which of the following may be the title of the passage?
A．Perfect Match         B．Successful Graft
C．Anonymous Donor  D．Lucky Christmas Tree
65．What can we know about the Christmas tree in Rockefeller Center?
A．It was planted by the local inhabitants of Rockefeller in the United States.
B．Diana got saved under the Christmas tree and so loved it.
C．Many Americans love the tree because it was raised during the depths of the depression.
D．The tree is very tall and beautifully decorated by people at Christmas time.
66．It can be inferred from the passage that         .
A．leukemia is so serious a disease that nobody can survive in America
B．patients who suffer from leukemia may feel very weak
C．bone marrow transplant is very easy to carry out in America
D．the man donor knew Diana would become his wife in advance
67．Which of the following is true about their first meeting with each other?
A．Diana met David at the hospital on the day when she was operated on.
B．Diana went to David’s home in Dedham in order to thank him in person.
C．David and Diana fell in love with each other when they first met.
D．David didn’t telephone Diana to inform her of the date of his visiting her.

None of our early ancestors could digest milk as adults because their bodies never had to ----milk drinking simply wasn’t an option. As people began to extract milk from animals, though, some people developed the ability to keep drinking it throughout their lives.
Scientists now know of a milk-related mutation ( 变异) in our genes -- the chemical instructions for life that we carry in almost every cell in our bodies. People who have a mutated form of one particular gene can drink milk just fine. People without the mutation tend to get sick from milk.
To figure out where, and possibly why, milk drinking started, some scientists have been looking at who has the milk-digesting mutation today. Patterns are striking.
Most adults in Northern and Central Europe are able to digest milk -- and they do. Cheese and butter and other dairy products are popular in countries such as Sweden, Denmark, Germany and England. Because European settlers dominated North America, most people here can handle milk just fine, as well. That may explain why ice cream is such a popular dessert in the United States.
In much of Africa, Asia and South America, on the other hand, people tend to avoid dairy products because they lead to diarrhea (腹泻) and other stomach problems. (That’s why you won’t typically find cheese on the menu at a Chinese, Japanese or Ethiopian restaurant.) Native
Americans are also unable to digest milk.
Based on these genetic patterns, scientists have long thought that- milk drinking started inNorthern Europe, where dairy is an institution and the milk-digesting mutation is everywhere.
A recent study painted a different picture. With a computer medal, Thomas and colleagues looked at the spread of the milk-drinking mutation, farming and other related factor. Working backward, the scientists concluded that the first milk-thinkers lived in Central Europe around what’s now Hungary about 7,500 years ago. The practice didn't start farther north, as scientists had thought before.
66. Which of the following is the proper order of events according to the passage?
a. Their children were able to digest milk as adults.
b. They got sick from the milk.
c. Some people got a mutation in their genes.
d. Some people tried drinking milk from animals.
e. Some people started to drink milk from animals on a regular basis.
A. c→d→b→e→a   B. d→e→b→c→a  C. d →b→e→c→a   D. e→d→b→c→a
67. Most people in the USA can digest milk because __________.
A. they have strong stomachs              B. their ancestors were Europeans
C. that’s where milk drinking stinted       D. farmers raise a lot of cows there
68. Which of the following is LEAST likely to appear on the menu in a Japanese restaurant?
A. Butter.          B. Vinegar.          C. Fish.               D. Beef.
69. Which of the following is the author most likely to agree with?
A. Milk drinking first started in Northern Europe.
B. Milk drinking first started in Central Europe.
C. North American Indians were able to digest milk.
D. Dairy products are very popular in North Korea.
70. The main focus of the scientists' research was ______________.
A. mutation of human genes               B. development of the human stomach
C. why milk drinking started              D. where milk drinking first started