o 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 50 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
51 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 sitins 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 52 .
But strong opinions have not brought 53 . Americans are ambivalent about what they put in their mouths. We have become54 of our foods, especially as we learn more about what they contain.
The 55 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 56 it with friends, family, and strangers—that help define America as a community today.
A. answerB. resultC. shareD. guiltyE. constant
F. definedG. vanishH. adaptedI. creativeJ. belief
K. suspiciousL. certaintyM. obsessedN. identifyO. ideals
Section B
Directions:There are 2 passages in this section.Each passage is followed by some questions or unfinished statements.For each of them there are four choices marked A）,B）,C） and D） .You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.
Passage One Questions 57 to 61 are based on the following passage. Resources can be said to be scarce in both an absolute and relative sense: the surface of the Earth is finite, imposing absolute scarcity; but the scarcity that concerns economists is the relative scarcity of resources in different uses. Materials used for one purpose cannot at the same time be used for other purposes; if the quantity of an input is limited, the increased use of it in one manufacturing process must cause it to become less available for other uses.
The cost of a product in terms of money may not measure its true cost to society. The true cost of, say, the construction of a supersonic jet is the value of the schools and refrigerators that will never be built as a result. Every act of production uses up some of society\'s available resources; it means the foregoing of an opportunity to produce something else. In deciding how to use resources most effectively to satisfy the wants of the community, this opportunity cost must ultimately be taken into account.
In a market economy the price of a good and the quantity supplied depend on the cost of mak
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