One and a half hour（）since we arrive. No one has come to meet us.

A . travel B . journey C . voyage D . tri

A . clearance B . crush C . pitch D . thrust

A . a;a B . the; the C . 不填；the D . a;不填

A.×;× B.the;a C.a;× D.an;a

Earlier Studies have documented half-brain sleep in a wide range of birds. The brain hemispheres take turns sinking into the sleep stage characterized by slow brain waves. The eye controlled by the sleeping hemisphere keeps shut, while the wakeful hemisphere's eye stays open and alert. Birds also can sleep with both hemispheres resting at once. Decades of studies of bird flocks led researchers to predict extra alertness in the more vulnerable, end-of-the-row sleepers. Sure enough, the end birds tended to watch carefully on the side away from their companions. Ducks in the inner spots showed no preference for gaze direction. Also, birds dozing (打盹) at the end of the line resorted to single-hemisphere sleep, rather than total relaxation, more often than inner ducks did. Rotating 16 birds through the positions in a four-duck row, the researchers found outer birds half-asleep during 32 percent of dozing time versus about 12 percent for birds in internal spots. "We believe this is the first evidence for an animal behaviorally controlling sleep and wakefulness simultaneously in different regions of the brain," the researchers say. The results provide the best evidence for a long-standing supposition that single- hemisphere sleep evolved as creatures scanned for enemies. The preference for opening an eye on the. lockout side could be widespread, he predicts. He's seen it in a pair of birds' dozing side-by-side in the zoo and in a single pet bird sleeping by a mirror. The mirror-side eye closed as if the reflection were a companion and the other eye stayed open. Useful as half-sleeping might be, it's only been found in birds and such water mammals (哺乳动物) as dolphins, whales, and seals. Perhaps keeping one side of the brain awake allows a sleeping animal to surface occasionally to avoid drowning. Studies of birds may offer unique insights into sleep. Jerome M. Siegel of the UCLA says he wonders if birds' half-brain sleep "is just the tip of the iceberg (冰山) ". He speculates that more examples may turn up when we take a closer look at other species. A new study on birds' sleep has revealed that ______ A．half-brain sleep is found in all kinds of birds B．half-brain sleep is characterized by accelerated brain waves C．birds can control their half-brain sleep consciously D．birds always sleep with the whole of their brain at rest

The driver looked at her but made no answer, so she repeated the question. To her surprise, he then closed the door, on her arm, and drove off. The woman, her arm stuck in the door, ran alongside the bus, shouting. Passengers said the driver stopped after almost a block only because they, too were shouting. When the driver finally did stop and open the door, the woman jumped on the bus to get his bus number. Then he took off again and went another couple of blocks before other shouting passengers persuaded him to stop and let the woman off. After the driver' s bossed at a tax-support governmental company(CTA) heard of the incident, they looked into it and set his punishment: a five-day suspension (停职) without pay. That struck me as rather light. But Bill Baxa, the company' s public-relation man, "That' s a pretty serious punishment. Five days off work is a serious punishment for dragging a woman alongside a bus by her arm？ Baxa said, "Any time you take money away from someone, it is a terrible punishment. The driver make $14 an hour. Multiply(乘)that by 40 and you can see that he lost." Yes, that come to $560, a good sum. But we know that people in the private company are fired for far less every day. If the people who run the bus company think that the loss of a week' s pay is more than enough, I offer them a sporting suggestion: Give me a bus. Then have their arms in the doorway of the bus, and I' 11 slam the door shut, shut the bus quickly and take them for a fast one block run. And I'll pay $560 to anyone who is bold enough to try it. Any takers？ Mr Baxa？ Anyone？ I didn't think so. The nurse half-entered one of the buses because ______. A．the bus they wanted didn't stop B．She wanted the driver to stop the bus C．She wanted to get some information from the driver D．She and her uncle couldn't wait any longer at the corner

A．A.two sixths B．B.three fourths C．C.one three D．D.three sixths

M: Sure. But you won't find anything in my notes. He didn't say anything important during your absence. Q: What do we learn from the conversation？ (19) A．Jim's notes are not very good. B．Professor Harrison doesn't teach well. C．Mary should have come to the lecture earlier. D．Mary doesn't have to borrow notes from Jim.

A．isbuilding;takes B．isbeingbuilt;willtake C．isbuilt:willtake D．isbeingbuilt;takes

A．real work tasks B．having lunch C．commuting D．socializing

A. kept up B. held up C. cut up D. brought up

What have India and Pakistan agreed to do？ A．To improve telecommunications. B．To avoid misunderstanding. C．To warn of military clashes. D．To prevent nuclear confrontation.

The latest Dream managed an average speed of 89.76 km/h, compared to 84.96 km/h for the previous one, despite stormy winds and uphill slope slowing all the competitors during the event's second day. However, during the final day's run from the South Australian desert mining town of Coober Pedy to Adelaide, the Dream cruised(以发动机效率最高的速度行驶) at 100 km/h, occasionally accelerating to 110 km/h. "We are very tired and very happy," the Dream team's project leader, Masashi Kitagawa, told the crowd of reporters waiting at the finish line at Adelaid's Technology Park. The School of Biel team placed second, an hour and 28 minutes behind the Dream, having averaged 86 km/h. The Swiss engineering school is Honda's perennial rival(竞争对手) in this event, having beaten Honda in 1990 to set a course record of 38.50 hours. However, they placed a distant second to the Honda Dream in the 1993 event. A full report, along with pictures, will appear in the next issue of Honda: The Magazine. The phrase "the latest generation of Honda's solar ears, the Dream" implies that ______. A．Honda is a car maker B．the Dream is a model of solar car produced by Honda C．Honda's solar technologies are being improved over time D．all of the above

If the argument in the passage is valid, taboos against eating in-the presence of others who are NOT also eating would be LEAST likely in a society that ______. A．always had a plentiful supply of food B．emphasized the need to share worldly goods C．emphasized the value of privacy D．discouraged overindulgence

The future health of Americans may depend on it. Just this week, a study reported that life expectancy (预期寿命) has fallen or is no longer increasing in some parts of the United States. The situation is worst among poor people in the southern states, and especially women. Public health researchers say it is largely the result of increases in obesity (肥胖), smoking and high blood pressure. They also blame differences in health services around the country. In 2006, a study found that only four percent of elementary schools provided daily physical education all year for all grades. This was true of eight percent of middle schools and two percent of high schools. The study also found that 22 percent of all schools did not require students to take any P. E. (体育课). Charlene Burgeson is the executive director of the National Association for Sport and Physical Education. She says one problem for P. E. teachers is that schools are under pressure to put more time into academic subjects. Also, parents may agree that children need exercise in school. Yet many parents today still have bad memories of being chosen last for teams because teachers favored the good athletes in class. But experts say P. E. classes have changed. They say the goal has moved away from competition and toward personal performance, as a way tp build a lifetime of activity. These days, teachers often lead activities like weight training and yoga. Some parents like the idea of avoiding competitive sports in P.E class. Yet others surely dislike that idea. In the end, schools may find themselves in a no-win situation. Why are schools recommended to give students certain time for sports？ A．Because different schools set up different physical education programs. B．Because the physical activity of children will influence their health in adulthood. C．Because nowadays children spend too much time on their studies. D．Because only four percent of elementary schools provided daily physical education.

They could see there was something wrong with both watches. They observed them for several hours before speaking to each other. They both silently found the German watch was losing 60 minutes and the Japanese are doubled that. The scientists with the Japanese watch then slowly raised his head and said, “Both watch are out of work, but my watch is right more often than yours, so it’s better.” The scientist with the German watch went home without saying a word. (1) The two scientists were quarrelling at the beginning of the story, because_______. A.the Japanese watch was better B.the German watch was better C.each of them thought his own watch was better than the other’s D.both the watches were wrong (2) They did an experiment because they_______. A.wanted to know whose watch was better B.liked their lab C.wanted to repair their watches D.had a basin of water in their lab (3) After they did the experiment, they found_______. A.both their watches were good B.neither of their watches could tell the correct time C.there was something wrong with the German watch D.there was something wrong with the Japanese watch (4) After putting the Japanese watch in water for 20 minutes, two scientists found_______. A.it was a good watch B.it went forward C.it went faster than the German one D.it went backwards 120 minutes (5) How about the German watch at last？ A.It went more correctly than before. B.It stopped working. C.It went as well as the Japanese one. D.It was better that the Japanese one.

A．to light B．down C．under control D．to an end

A.as much as B.more than C.less than D.more or less than

The mistake was made more than a hundred years ago in the British colony of Mauritius, a small 23 in the Indian Ocean.24 1847 an order for stamps was sent to a London printer Mauritius was 25 the fourth country in the world to issue stamps. Before the order was filled and delivered, a ball was planned at Mauritius'Government House, and stamps were needed to 26 the invitations.A local printer was instructed to 27 the design for the stamps.He accidentally inscribed the words “Post Office” 28 “Post Paid” on the several hundred stamps that he printed. Today 29 only twenty-six of these misprinted stamps left, fourteen One Penny Orange-Reds and twelve Two Penny Blues.Because of the Two Penny Blue's rareness and age, collectors have paid 30 $16800 for it. 21.A.arrow B.mistake C.print D.value 22.A.test B.cause C.course D.worth 23.A.island B.people C.continent D.land 24.A.Since B.For C.In D.On 25.A.to appeal to B.to become C.to worry D.to allow 26.A.deal in B.deal with C.send out D.send for 27.A.decide B.agree C.steal D.copy 28.A.instead of B.instead for C.in spite of D.in need of 29.A.take out B.there are C.for example D.X 30.A.as little as B.as much as C.so much D.great deal