阅读理解At 18， Ashanthi DeSilva of suburban Cleveland is a living symbol of one of the great intellectual achievements of the 20th century

单选题Inviting, suggesting, warning, ordering are instances of commissives.

单选题He was very distraught. Later on, once he composed himself, he agreed to meet with detectives.

单选题Abruptly the ground fell away from our feet, and an ______ void opened before us.

单选题Women are quite competent drivers, but they are very seldom consistently first-class. At best they are a mild hazard, at worst potentially lethal. A wise male driver will always give them plenty of road and still be on the look-out for the unpredictable to happen. This deficiency has nothing to do with their lack of ability to cope with the mechanical complexities of the vehicle; it is due to an inherent characteristic which, in certain other circumstances, may be highly desirable, but which, behind the wheel, is deadly. It is their lust for talking. Women together in a car succumb to this need and when they talk they look into each other's faces. Simple words are insufficient. It is necessary for them to see the expression which partners words and so read the meaning the words leave unsaid. When talking instead of listening, they look to estimate the reaction their words have had. Thus two women in the front of a car repeatedly distract each other's attention from the road and four represent an incredible danger because the one nominally driving the car feels it necessary not only to see and hear what her companion is talking about but also, such is her nature, what those in her back are discussing in case it is anything into which she can inject an added opinion, or in the hope of collecting fresh fuel to feed other fires on later occasions. Quite apart from this factor, which means that the road ahead is quite often an unknown quantity, women seldom use the driving mirror except for cosmetic purposes, after which its position gives the driver little indication of the state of the road behind. A final important factor that seems to lie at the back of feminine attitudes to driving is that comparatively few women have the feel for a machine that so many men have; the satisfaction of a slick change-down means nothing to them. The co-ordination between the various maneuvers, an operation which gives many men a boost of pride, is only a momentary lapse in their concentration on the topic in hand.

单选题By the time I get to the office 10 minutes later, I"ve already risked being hit by a car several times. Italy and China are very similar in this respect. Traffic lights have more of an ornamental function than a practical one.

单选题The spring will continue to bounce. It will bounce at its natural frequency. It will do this until all of the energy is used up. This is energy that was originally put into it.

单选题I______yesterday, but I was suspended by an unexpected visit.

单选题Beneath its myriad rules, the fundamental purpose of ______ is to make the world a more pleasant place to live in, and you a more pleasant person to live with.

单选题The connective implication corresponds to the English ______.

单选题" Essay end up in books, " —like this one—" but they start their lives in magazines, " wrote Susan Sontag in her introduction to The Best American Essays 1992. That"s what I see first, year and year; the magazines. Hundreds of them. Some so slick they slip from my hands and slide off each other when I try to construct neat piles. Some of the satiny and scented fashion magazines display so much commercialized fetishism—high-gloss models brought to erotic ecstasy by luxurious handbags—that I feel, as I dutifully flip through the clingy pages searching for content, I must be a creature from a different planet, a terribly deprived and disadvantaged one. Still, that doesn"t prevent me from sniffing the perfume ads along the way, and for an intoxicating moment sample a world where reading and writing essays seems not just a marginal occupation, but decidedly declasse. The Best American Essays features a selection of the year"s outstanding essays, essays of literary achievement that show an awareness of craft and forcefulness of thought. Hundreds of essays are gathered annually from a wide assortment of national and regional publications. These essays are then screened, and approximately one hundred are turned over to a distinguished guest editor, who may add a few personal discoveries and who makes the final selections. The list of Notable Essays appearing in the back of the book is drawn from the final comprehensive list that includes not only all the essays submitted to the guest editor but also many that were not submitted. To qualify for the volume, the essay must be a work of respectable literary quality, intended as a fully developed, independent essay on a subject of general interest(not specialized scholarship), originally written in English(or translated by the author)for publication in an American periodical during the calendar year. Today"s essay is a highly flexible and shifting form, however, so these criteria are not carved in stone. Magazine editors who want to be sure their contributions will be considered each year should submit issues or subscriptions to: Robert Atwan, Series Editor, The Best American Essays. P. 0. Box 220, Redville, MA 02137. Writers and editors are welcome to submit published essays from any American periodical for consideration; unpublished work does not qualify for the series and cannot be reviewed or evaluated. Please note: all submissions must be directly from the publication and not in manuscript or printout format. Editors of online magazines and literary bloggers should not assume that appropriate work will be seen; they are invited to submit printed copies of the essays(with full citations)to the address above.

单选题There used to be an old city here, which was______under the river about 2,000 years ago.

单选题We think it is wrong to single out any______of society for Aids testing.

单选题______divides the 19th century into the age of Romanticism and Realism in American literature.

单选题All languages have some differences in verb forms which are used to produce cohesion.（南开大学2005研)

单选题The policy incurred queries from the public. Many said that establishing a link between employment rate and college courses is reasonable because colleges have the responsibility to provide useful human resources to promote social development, but deciding a major"s fate based solely on that rate, however, is not.

单选题The emergence of the Net has ______.

单选题{{B}}Text 2{{/B}} It is a wise father that knows his own child, but today a man can boost his paternal (fatherly) wisdom— or at least confirm that he's the kid's dad. All he needs to do is shell out $30 for paternity testing kit (PTK) at his local drugstore—and another $120 to get the results. More than 60,000 people have purchased the PTKs since they first became available without prescriptions last year, according to Doug Fogg, chief operating officer of Identigene, which makes the over-the-counter kits. More than two dozen companies sell DNA tests directly to the public, ranging in price from a few hundred dollars to more than $ 2,500. Among the most popular: paternity and kinship testing, which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption. DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family's geographic roots. Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA. But some observers are skeptical. "There is a kind of false precision being hawked by people claiming they are doing ancestry testing," says Troy Duster, a New York University sociologist. He notes that each individual has many ancestors—numbering in the hundreds just a few centuries back. Yet most ancestry testing only considers a single lineage, either the Y chromosome inherited through men in a father's line or mitochondrial DNA, which is passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other great-grandparents or, four generations back, 14 other great-great-grandparents. Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies don't rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may have a lot of data from some regions and not others, so a person's test results may differ depending on the company that processes the results. In addition, the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.

单选题Nonviolent demonstrations often create such tensions that a community that has constantly refused to______its injustices is forced to correct them: the injustices can no longer be______.

单选题If not______with the respect he feels due to him, Bob gets very ill-tempered and grumbles all the time.