单选题If it ______ too much trouble I"d love a cup of tea.

单选题When Mr. Black retired, his son______the business.

单选题A considerable amount of time and money has been invested in______this system.

单选题Staring at the ruins of his house, he couldn't______ how the fire had broken out.

单选题To get the information from BDU every day, you must______.

单选题Alaska's Tongass and Chugach National Forests are America's first and second largest national forests ______.

单选题If the world was really like what the figure pictures, then each individual today would have only one ______ a hundred or a million generation.

单选题Caller: Hello! I want to make a person-to-person call to Toronto, Canada. The number is 932-0806.Operator: ______.

单选题From the last paragraph we can infer that ______.

单选题 A fire engine must have priority as it usually has to deal with some kind of ______.

单选题The nation ______ the death of its great war leader. A. protruded B. lamented C. rebuked D. racked

单选题The missing child" s parents became more and more worried as the hours______.

单选题Who invented animated road signs?

单选题When retailers want to entice customers to buy a particular product, they typically offer it at a discount. According to a new study to be published in The Journal of Marketing, they are missing a 26 . A team of researchers, led by Akshay Rao of the University of Minnesota's Carlson School of Management, looked at consumers' attitudes to discounting. Shoppers, they found, much prefer getting something extra free to getting something cheaper. The main reason is that most people are 27 at fractions. Consumers often 28 to realise, for example, that a 50% increase in quantity is the same as a 33% discount in price. They overwhelmingly assume the former is better value. In an experiment, the researchers sold 73% more hand lotion when it was 29 in a bonus pack than when it carried an equivalent discount. This numerical blind spot remains even when the deal clearly favor the discounted product. In another experiment, this time on his undergraduates, Mr. Rao offered two deals on loose coffee beans: 33% extra free or 33% off the price. The discount is by far the better proposition, but the 30 clever students viewed them as equivalent. Studies have shown other ways in which retailers can exploit consumers' innumeracy. One is to confuse them with double discounting. People are more likely to see a 31 in a product that has been reduced by 20%, and then by an additional 25%, than one which has been bargain to an equivalent, one-off, 40% 32 . Marketing types can draw lessons beyond just pricing, says Mr. Rao. When advertising a new car's 33 , for example, it is more 34 to talk about the number of extra miles per gallon it does, rather than the equivalent percentage fall in fuel 35 . A. bargain B. consumption C. convincing D. deduction E. doubtfully F. efficiency G. hopeless H. afforded I. paid J. persuading K. reduction L. struggle M. supposedly N. trick O. useless

单选题She ______ always ______ what she has just drawn and beginning overagain.

单选题According to the author, ______ is the most important function of institutions of higher education.

单选题 马可·波罗(Marco Polo)是来自意大利的著名旅行家。他于1275年到达元朝(the Yuan Dynasty)的首都。从那时起他在中国游历17年，访问了中国的许多城市。回到意大利后，马可·波罗与他人合作，写下了《马可·波罗游记》(The Travels of Marco Polo)。在这本游记里，马可·波罗描绘了一个辉煌的东方世界，详细介绍了中国的著名城市。该书一出版，就受到了欧洲人的热烈欢迎，激起他们对东方文明的兴趣。

单选题Christmas is a holiday usually celebrated on December 25th ______ the birth of Jesus Christ.