__________, the crops would be saved.

A.“G”

B.“D”

C.“F”

D.“B”

选词填空：The method for making beer has changed over time. Hops (啤酒花)，for example, which many a modern beerits bitter flavor, are a 26 recent additions to the beverage. Thiswas mentioned in reference to brewing in the ninth century. Now, researchershave found a 27 ingredient in residue (残留物) from 5000-year-old beer brewingequipment. While excavating two pits at a site in thecentral plains of China, scientists discovered pottery fragments from pots,funnels, amphorae, and stoves (stove fragment pictured). The different shapesof the containers 28 theywere used to brew, filter, and store beer—they may be ancient “beer-making tools,” and the earliest 29 evidence of beer brewing in China, the researchers report online today in theProceedings of the National Academy of Sciences.To30 thathypothesis, the team examined the yellowish, dried 31 insidethe vessels. The majority of the grains—about 80%—were from cereal cropslike barley (大麦), andabout 10% were bits of roots, 32 lily,which would have sweetened the brew, the scientists say. Barley was anunexpected find: The crop was domesticated in western Eurasia and didn’t becomea 33 food incentral China until about 2000 years ago, according to the researchers. basedon that timing, they suggest barley may have 34 in theregion not as food, but as 35 material forbeerbrewing.

A) arrived

B) consuming

C) direct

D) exclusively

E) including

F) inform

G) raw

H) reached

I) relatively

J) remains

K) resources

L) staple

M) suggest

N) surprising

O) test

recent invention, only about 10,000 years old. Many crop plants are rather new additions to our diet: broccoli (a flowering mutant of kale) is thought to be only 500 years old. Most innovation is far more recent still. Although Austrian monk Gregor Mendel's pea plant experiments quietly laid the basic foundations of genetics in the mid-19th century, his work was rediscovered and applied to crop breeding only at the beginning of the 20th century. Further advances have steadily accumulated. The 1940s saw the identification of DNA as genetic material and the adoption, by commercial breeders, of genetic modification - typically by applying chemicals or radiation to DNA to try to make plants with advantageous characteristics. The modifications ultimately led to the green revolution of the 1960s and 1970s, during which time global wheat yields tripled. The 1980s and 1990s saw the commercial adoption of agricultural biotechnology, which has allowed breeders to introduce specific genes into crops from the same or different species. In 2004 the first plant genome was fully sequenced, and since then the number of plant gene sequences in GenBank, the public repository for gene sequence information, has been doubling every two years. Our knowledge is increasing exponentially, as it has been in other fields such as semiconductors and cellular telephony. Our challenge is to increase agricultural yields while decreasing the use of fertilizer, water, fossil fuels and other negative environmental inputs. Embracing human ingenuity and innovation seems the most likely path. Plants did not evolve to serve humans, and their sets of genes are incomplete for our purposes. The integral role of modifying genes is obvious to all breeders, though sometimes painfully absent from the public's understanding of how modern agriculture succeeds. All breeding techniques, from before Mendel's time until today, exploit modifications to plant DNA. These modifications can take the form. of mistakes or mutations that occur during natural cell division in the wild; the natural but random movement of DNA sequences from one part of a plant's genome to another; or the more precise insertion of known gene sequences using biotechnology. In all these cases, plant genes are moved within or across species, creating novel combinations. Hybrid genetics - the combination of different versions of the same gene – has resulted in spectacular yield increases. Largely as the consequence of using hybrid seed varieties, corn yields in the U.S. have increased more than 500 percent in the past 70 years. Questions 6-10 are based on Passage Two.

(1)Which statement is correct according to paragraph one？

A、Broccoli was first bred by Mendel

B、Broccoli wasn’t considered edible until 500 years ago

C、Mendel's work was considered most important in the history of genetics

D、Mendel’s study found its major application some 100 years ago

(2)What was cited as a result of the green revolution？

A、Sharp rise in worldwide wheat production

B、Extensive use of organic fertilizer

C、Large-scale adoption of genetic modification

D、Commercial success of genetically modified seeds.

(3)Which statement is true of GenBank according to the passage？

A、The number of gene sequences has doubled since its foundation

B、The commercial breeders are its main sponsors

C、It is a genetic sequence database

D、It was founded in 2004

(4)It can be learned from the passage that the significance of genetic modification is ______.

A、questioned by some critics

B、poorly conveyed to the public

C、appreciated by all breeders

D、fully understood only by scientists

(5)The word “novel” in paragraph three is closest in meaning to ______.

A、artificial

B、various

C、hybrid

D、new

_1_ about it afterward. We say we want only the best, but we strangely enjoy junk food. We're _2_ with health and weight loss but face an unprecedented epidemic of obesity（肥胖）. Perhaps the _3_ to this ambivalence（矛盾情结）lies in our history. The first Europeans came to this continent searching for new spices but went in vain. The first cash crop（经济作物）wasn't eaten but smoked. Then there was Prohibition, intended to prohibit drinking but actually encouraging more _4_ ways of doing it.

The immigrant experience, too, has been one of inharmony. Do as Romans do means eating what “real Americans” eat, but our nation's food has come to be _5_ by imports—pizza, say, or hot dogs. And some of the country's most treasured cooking comes from people who arrived here in shackles.

Perhaps it should come as no surprise then that food has been a medium for the nation's defining struggles, whether at the Boston Tea Party or the sitins at southern lunch counters. It is integral to our concepts of health and even morality whether one refrains from alcohol for religious reasons or evades meat for political.

But strong opinions have not brought _7_ . Americans are ambivalent about what they put in their mouths. We have become _8_ of our foods, especially as we learn more about what they contain.

The _9_ in food is still prosperous in the American consciousness. It's no coincidence, then, that the first Thanksgiving holds the American imagination in such bondage（束缚）. It's what we eat—and how we _10_ it with friends, family, and strangers—that help define America as a community today.

A. answer

I. creative

B. result

J. belief

C. share

K. suspicious

D. guilty

L. certainty

E. constant

M. obsessed

F. defined

N. identify

G. vanish

O. ideals

H. adapted

What is happening in our weather？ Of course we have never been able to predict exactly what the weather will be like, but now strange weather patterns are seriously affecting many parts of the world. For example, droughts (旱灾) in Mexico and Brazil have recently caused great crop losses and in the United States they have even had to make their own snow for the Winter Olympics!

Scientists have found that the cause of this strange weather is that the air circulation pattern has changed and is now more variable than earlier in the twentieth century. This means that different regions of the world get long spells (持续时间) of the same type of weather, whether hot , cold, wet or windy.

However, weather experts have different views about why this has happened. One theory is that the temperature of the sea has increased. Another is that man’s activities on earth have disturbed the balance of nature.

Whatever the cause, the economics of many countries in the world depend upon the weather. And until we know exactly what effect man’s activities are having on the weather, we cannot make changes which might help. So for the moment the only answer is …wait and see!

26. Which of the following statements is TRUE according to the first paragraph？

A. We have never predicted the weather.

B. Man is now able to control the weather.

C. Strange weather has appeared only in some North American countries.

D. It has always been impossible for man to predict the weather accurately.

27. The strange weather patterns on the earth can he best described as ________.

A. steady and balanced C. likely to cause serious disasters

B. changeable but predictable D. unpredictable but favorable to man

28. The word “affecting” in Paragraph 1 can be replaced by ________.

A. yielding good crops in C. causing few losses in

B. having harmful effects on D. producing desired effects on

29. We can learn from Paragraph 2 that ________.

A. weather patterns are similar in different regions of the world

B. the air circulation pattern remains unchanged in the last century

C. our weather depends on the changes in the air circulation pattern

D. it is possible to predict weather patterns over a long period of time

30. It can be learned from this passage that ________.

A. scientists have similar opinions about the changing weather

B. no one is sure about the cause of the changing weather

C. cutting down forests has affected the climate

D. the weather will become worse in the future

ong with the many folks looking to make a permanent home in the United States came those who had no intention to stay, and 7millin people arrived while about 2 million departed. About a quarter of all Italian immigrants, for exanmle, eventually returned to Italy for good. They even had an affectionate nickname, “uccelli di passaggio,” birds of passage.

Today, we are much more rigid about immigrants. We divide nemcomers into two categories: legal or illegal, good or bad. We hail them as Americans in the making, or our broken immigrantion system and the long political paralysis over how to fix it. We don’t need more categories, but we need to change the way we think about categories. We need to look beyond strick definitions of legal and illegal. To start, we can recognize the new birds of passage, those living and thriving in the gray areas. We might then begin to solve our immigration challenges.

Crop pickers, violinists, construction workers, entrepreneurs, engineers, home health-care aides and physicists are among today’s birds of passage. They are energetic participants in a global economy driven by the flow of work, money and ideas .They prefer to come and go as opportunity calls them , They can manage to have a job in one place and a family in another.

With or without permission, they straddle laws, jurisdictions and identities with ease. We need them to imagine the United States as a place where they can be productive for a while without committing themselves to staying forever. We need them to feel that home can be both here and there and that they can belong to two nations honorably.

Accommodating this new world of people in motion will require new attitudes on both sides of the immigration battle .Looking beyond the culture war logic of right or wrong means opening up the middle ground and understanding that managing immigration today requires multiple paths and multiple outcomes. Including some that are not easy to accomplish legally in the existing system.

“Birds of passage” refers to those who____ .

A.immigrate across the Atlantic.

B.leave their home countries for good.

C.stay in a foreign temporialy.

D.find permanent jobs overseas.

It is implied in paragraph 2 that the current immigration system in the US____ .A.needs new immigrant categories.

B.has loosened control over immigrants.

C.should be adopted to meet challenges.

D.has been fixed via political means.

According to the author, today’s birds of passage want___ .A.financial incentives.

B.a global recognition.

C.opportunities to get regular jobs.

D.the freedom to stay and leave.

The author suggests that the birds of passage today should be treated ____ .A.as faithful partners.

B.with economic favors.

C.with regal tolerance.

D.as mighty rivals.

Select the title that is most suitable for the articleA.come and go: big mistake.

B.living and thriving : great risk.

C.with or without : great risk.

D.legal or illegal: big mistake.

请帮忙给出每个问题的正确答案和分析，谢谢！