单选题It is obvious that the sports games are no longer amateur affairs; they have become professionally______.

单选题Meanwhile, I always kept in touch with my former professor at college.

单选题The scientists have made an ______ study of the viruses that cause the disease.

单选题In (business as a whole), there is a controversy (as to) whether (are businesses) really encouraging the prospects of greater (equality) in the workplace.

单选题Americans tend to use others' family names ______.

单选题Work sharing is different from job sharing in that ______.

单选题Very few experts ______ with completely new answers to the world's economic problems.

单选题Woman: I am thinking of taking three language courses next semester.Man: I think it's advisable not to bite off more than you can chew.Question: What does the man mean ?

单选题Reform and opening-up have brought about Uprofound/U changes to the lives of the Chinese.

单选题Accommodations must be made for students with learning disabilities.

单选题(It is ironic) that although in 1955 actor James Dean made an advertisement warning teens of (how harm) it was to drive (fast), he himself died (from) a speeding accident.

单选题It was a merry Christmas for Sharper Image and Neiman Marcus, which reported big sales increases over last year's holiday season. It was considerably less cheery at Wal-Mart and other lowpriced chains. We don't know the final sales figures yet, but it's clear that high-end stores did very well, while stores catering to middle- and low-income families achieved only modest gains. Based on these reports, you may be tempted to speculate that the economic recovery is an exclusive party, and most people weren't invited. You'd be right. Commerce Department figures reveal a startling disconnect between overall economic growth and the incomes of a great majority of Americans. In the third quarter, real G. D. P. rose at an annual rate of 8.2%. But wage and salary income, adjusted for inflation, rose at an annual rate of only 0.8%. Why aren't workers sharing in the so-called boom? Start with jobs. Employment began rising in August, but the pace of job growth remains modest, averaging less than 90 000 per month. But if the number of jobs isn't rising much, aren't workers at least earning more? You may have thought so. After all, companies have been able to increase output without hiring more workers, thanks to the rapidly rising output per worker. Historically, higher productivity has translated into rising wages. But not this time: thanks to a weak labor market, employers have felt no pressure to share productivity gains. Calculations by the Economic Policy Institute show real wages for most workers flat or falling even as the economy expands. So who's benefiting from the economy's expansion? The direct gains are going largely to corporate profits. Indirectly, that means that gains are going to the big stockholders, who are the ultimate owners of corporate profits. For most Americans, current economic growth is something interesting, that is, however, happening to other people. This may change if serious job creation ever kicks in, but it hasn't so far. The big question is whether a recovery that does so little for most Americans can really be sustained. Can an economy thrive on sales of luxury goods alone? We may soon find out.

单选题{{B}}Passage Four{{/B}} Scientists are hoping to eliminate malaria (疟疾) by developing a genetically modified mosquito that cannot transmit the disease. Malaria has long troubled the populations of South America, Africa, and Asia, where mosquito bites infect up to 500 million people a year with this serious and sometimes fatal parasitic blood disease. For generations, scientists have been trying to eliminate malaria by developing new drugs and using pesticides (杀虫剂) to wipe out local mosquito populations. But these measure aren't working--and some scientists, like Greg Lanzaro, say that because of drug resistance and population changes, malaria is actually more prevalent now than it was 20 years ago. Lanzaro says he has a better way to stop the spread of malaria: genetically modifying mosquitoes so they are unable to carry the disease. Lanzaro and his. colleagues are planning a multi-year project to produce malaria-resistant mosquitoes--and he thinks they can do it within five years. "We can get foreign genes into mosquitoes and they go where they're supposed to go," Lanzaro says, pointing out that scientists have already succeeded in genetically engineering mosquitoes that cannot transmit malaria to birds and mice. And, he says, scientists are quickly making progress on genes that block transmission of the disease to humans as well. The most difficult part scientifically, Lanzaro says, is figuring out how to get the lab-engineered mosquitoes to spread their genes into natural populations. After all, he points out, it's useless to engineer mosquitoes in the lab that can't transmit malaria when there are millions out in the wild that can. To solve this problem, Lanzaro wants to load up a mobile piece of DNA with the malaria-resistant gene, and then insert it into a group of mosquito embryos. The malaria-resistant gene would be integrated directly into the mosquitoes' DNA, making it impossible for those mosquitoes to transmit the parasite that causes malaria. In this way a small group of lab-raised mosquitoes could be released into the wild, and by interbreeding with wild mosquitoes, eventually transmit the beneficial gene to the entire population.

单选题Man: This crazy bus schedule has got me completely frustrated. I can't for the life of me figure out when my bus to Cleveland leaves. Woman: Why don't you just go up to the ticket window and ask? Question: What does the woman suggest the man do?

单选题Gestures are an important means to ______messages.

单选题For ten years the problem about the water has not been solved; we came to think that it has been a______problem in this are

单选题You will soon ______ this climate and then the changes in temperature will not affect you.

单选题The president is often awakened by a noisy crowd which Uassembles/U on the White House.

单选题(It is said) that Einstein felt (very) (sad) about the application of his theories (onto) the creation of weapons of war.A. It is saidB. veryC. sadD. onto