单选题Huntington and many of its competitors are working to make remedial instruction a commodity as ______ and accessible as frozen yogurt.

单选题The storm sweeping over this area now is sure to cause ______ of vegetables in the coming days.

单选题______ we were out of the traffic jam we were able to resume(恢复) our normal speed.

单选题Every year a number of students graduate from the school which will ______ new students the first week in September.

单选题______lessons were not difficult.

单选题Recent research from animal behaviorists suggests that "as the crow flies" should no longer be taken to mean "the shortest distance between two points." Zoologists at Oxford University, 1 conducted an eighteen-month 2 of homing pigeons, have concluded that under some circumstances, pigeons follow 3 visual landmarks to find their way home 4 than taking the shortest, most direct route. 5 for their ability to navigate long distances, homing pigeons use the 6 of the sun and stars, their inbuilt compasses, and perhaps also their sense of smell to direct their flight over long 7 or on a journey for the first time. 8 , different factors appear to affect a pigeon"s navigation 9 it is released close to its 10 . Animal behaviorists reached this 11 after attaching small global positioning devices to the backs of pigeons and releasing them a few miles from their home. These devices enabled the scientists to 12 the precise location of each pigeon every second of 13 flight. Each pigeon was tracked for approximately twenty flights from the 14 point. For the first several flights, each bird"s path 15 significantly from the paths it had taken 16 . Subsequently, 17 , the bird would tend to follow the same path, 18 after flight, even though that path was not always the most direct route home. The scientists concluded that pigeons use a 19 of familiar visual landmarks to find their way when they are near their home rather than relying primarily on compass navigation. Major highways are one 20 landmark. Almost comically, some of the pigeons followed the path of a major highway they could see below them, turning where the road turned, and even following the circular path of the exit ramps.

单选题Those relations of his are______ . I don't want to have any dealings with them.

单选题Psychologists have done extensive studies on how well patients ______ with doctors' orders. A. comply B. correspond C. interact D. interfere

单选题A body weighs______from the surface of the earth.

单选题______ that your son is well again, you no longer have anything to worry about.

单选题It is probably both that he is going to the meeting on time ______ by the morning traffic jam.

单选题If I had not been enjoying the work, I ____________ so much of it.

单选题Ill write to our home office to ______ our claim immediately. A．waive B．wave C．weave D．wait

单选题Father does not like ______ meat. A. lean B. slim C. skinny D. slender

单选题Before you decide on a Uvocation/U, it might be a good idea to consult a few good friends.

单选题We all know that emotions originate in the brain. But we usually talk about our emotions coming from our hearts. If someone you know doesn't give up 27 , you might say, 'He's got a lot of heart.' Then what about bad emotions? When you feel so sad that your heart 'aches,' could it actually be true? A new study shows what goes on in your mind can, literally, break your heart. In the study, just published in the Journal of the American College of Cardiology, researchers looking at more than 63,000 women who were participants in the 28 Nurses' Health Study, found that, those who reported basic symptoms of depression had a higher-than-normal 29 of heart attack. And women who were clinically depressed were more than twice as 30 as other women to suffer sudden heart attack. None of the participants had heart problems at the study's 31 , but nearly 8% had symptoms of depression. The researchers theorize that depression might have some direct physiological impact on the heart—like 32 it to work harder in the face of stress. Or it may be that the antidepressants (抗抑郁药) 33 to treat those with mood problems were associated with heart diseases; in the study, sudden heart attack was linked more 34 with antidepressant use than with women's symptoms of depression. No one is sure exactly how depression hurts the heart, and one 35 explanation is that a damaged heart and its consequent stress on the body might activate, somehow, genes or other physiological changes that 36 to depression. A. risk E. strongly I. causing M. easily B. plausible F. outset J. process N. make C. ongoing G. likely K. contribute O. possibly D. sum H. meaningful L. prescribed

单选题The leaders of the two countries are planning their summit meeting with a ______ to maintain and develop good ties.

单选题It' s time the dog______how to behave properly.