单选题There are (hundred) (of kinds) of cheeses, and (they) differ in taste, texture, and (appearance).A. hundredB. of kindsC. theyD. appearance

单选题Waiter: Welcome, sir. May I help you? Customer: ______?

单选题Benjamin West was an eighteenth-century American artist who influenced British painters just so much as he did other American artists.

单选题Arriving at the bus stop, ______ waiting there.

单选题______the project as planned, we’ll have to work two more hours a day.

单选题—I hear David has won the first prize in the English lecture competition, Mr. Green. —______ , and ______.

单选题(Noticing) that my daughter was shy, our hostess (went out) of her way (making) her feel (at home).

单选题They started off late and got to the airport with minutes to ______. A. spare B. catch C. leave D. make

单选题Fifty years ago, wealthy people liked hunting wild animals for fun ______ sightseeing.

单选题______ the fog, we should have reached our destination.

单选题Regret is as common an emotion as love or fear, and it can be nearly as powerful. So, in a new paper, two researchers set about trying to find out what the typical American regrets most. In telephone surveys, Neal Rose, a psychologist and professor of marketing at the School of Management at Northwestern University, and Mike Morrison, a doctoral candidate in psychology at University of Illinois, asked 370 Americans, aged 19 to 103, to talk about their most notable regret. Participants were asked what the regret was, when it happened, whether it was a result of something they did or didn't do, and whether it was something that could still be fixed. The most commonly mentioned regret involved romance (浪漫的事) (18%)--lost loves or unfulfilled relationships. Family regrets came in second (16%), with people still feeling badly about being unkind to their brothers or sisters in childhood. Other frequently reported regrets involved career (13%), education (12%), money (10%) and parenting (9%). Rose and Morrison's study, which is to be published in Social Psychological and Personality Science, is significant in that it surveyed a wide range of the American public, including people of all ages and socio-economic and educational backgrounds. Previous studies on regret have focused largely on college students, who predictably tend to have education-focused regrets, like wishing they had studied harder or a different major. The new survey shows that in the larger population, a person's "life circumstances--accomplishments, shortcomings, situation in life-- inject considerable fuel into the fires of regret," the authors write. (79) People with less education, for instance were more likely to report education regret. People with higher levels of education had the most career regrets. And those with no romantic partner tended to hold regrets regarding love. Broken down (分解，细分) by sex, more women (44%) than men (19%) had regrets about love and family--not surprising, since women "value social relationships more than men," the authors write. In contrast, men (34%) were more likely than women (27%) to mention work-related regrets, wishing they'd chosen a different career path, for instance, or followed their passion. (80) Many participants also reported wishing they had worked less to spend more time with their children. There was an even split between regrets about inaction (not doing something) and action (do something you wish you didn't). But, like previous studies, the current research found that some regrets are more likely than others to persist over time: people tend to hang on longer to the regret of inaction; meanwhile, regrets of action tend to be more recent.

单选题Looking back on my childhood, I am convinced that naturalists are born and not made. Although we were all brought up in the same way, my brothers and sisters soon abandoned their pressed flowers and insects. Unlike them, I had no ear for music and languages. I was not an early reader and I could not do mental arithmetic. Before World War I we spent our summer holidays in Hungary. I have only the dim memory of the house we lived in, of my room and my toys. Nor do I recall clearly the large family of grand- parents, aunts, uncles and cousins who gathered next door. But I do have a crystal-clear memory of the dogs, the farm animals, the local birds and, above all, the insects. I am a naturalist, not a scientist. I have a strong love of the natural world, and my enthusiasm has led me into varied investigations. I love discussing my favorite topics and enjoy burning the midnight oil while reading about other people's observations and discoveries. Then something happens that brings these observations together in my conscious mind. Suddenly you fancy you see the answer to the riddle, because it all seems to fit together. This has resulted in my publishing 300 papers and books, of which some might be honored with the title of scientific research. But curiosity, a keen eye, a good memory and enjoyment of the animal and plant world do not make a scientist ; one of the outstanding and essential qualities required is self-discipline, a quality I lack. A scientist requires not only self-discipline but hard training, determination and a goal. A scientist, up to a point, can be made. A naturalist is born. If you can combine the two, you get the best of both worlds.

单选题They recommended ______ smaller heating and cooling systems. A. to use B. to be used C. being used D. using

单选题I was so familiar with her that I recognized her voice ______ I picked up the phone. A. the moment B. since C. before D. while

单选题So ______ is the weather in England that by lunchtime there could be thunder and lightening.

单选题Those who don't like baseball may complain that ______ .

单选题The medicine can prevent you ______.

单选题Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important. In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear. This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil—allowing the rain to sink in and also bind the soil, thus preventing it from being washed away easily; but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When all the top—soil is gone, nothing remains but worthless desert.

单选题In 1939 the Ohio and Mississippi river overflowed __________ the worst flood ever known in the United Stated．

单选题The hotel couldn"t offer ______ for all four of us.