单选题Mrs Edwards very much 'wanted to ______.

单选题He raised his arms to ______his face from the blow.

单选题The committee has anticipated the problems that ______ in the road construction project. A. arise B. will arise C. arose D. have arisen

单选题 We've all been there. You wake up in the middle of the night and grab your smartphone to check the time—it's 3 a. m.—and see an alert. Before you know it, you fall down a rabbit hole of e-mail and Twitter. Sleep? Forget it. Well, I've found a $7 solution: an old-fashioned alarm clock. My smartphone has been banished from the bedroom. 'It's a very slippery slope, once you've picked up your phone, to see what time it is, to checking your e-mail, to lying awake with anxiety,' said Dr. David M. Claman, director of the Sleep Disorders Centre at the University of California San Francisco Medical Centre. 'If you wake up in the middle of the night and check your phone, you will inevitably get frustrated and worried by something you've seen, leading your body to tense up.' Then it's game over. You're tossing and turning, thinking about an e-mail, a text or a meeting in six hours. All these sleep interruptions lead to work problems. A 2011 study by the American Academy of Sleep Medicine found that insomnia costs $2280 in lost productivity per American worker every year. That adds up to $63 billion a year for the nation. The draw of the smartphone is understandable. The alarm clock is a free feature. It's also incredibly convenient—who doesn't like being able to speak to their phone and say, 'Wake me up at 7 a.m.'? Device makers are helping the trend along and hoping these figures rise. Most new alarm clocks made today are designed to be married to a smartphone. This goes against years of research showing that screens, in any capacity, do everything but help us fall asleep. In 2012, the American Medical Association's Council on Science and Public Health said that 'exposure to excessive light at night, including extended use of various electronic media, can disrupt sleep or exacerbate (使恶化) sleep disorders.' Sleep researchers say that looking at a blue light, which is produced by smartphone and tablet screens, sets off brain receptors that are designed to keep us awake and interferes with circadian (生理节奏的) sleep patterns. Experimental research has found that if people use a tablet for up to two hours before bed, it takes an extra hour to fall asleep. Orfeu M. Buxton, a neuroscientist and assistant professor in the division of sleep medicine at Harvard Medical School, said the phone in the bedroom could set off what he called 'threat alertness,' which is a type of anxiety that keeps you awake. 'This means that you're never off, you're always watchful, which is a hallmark to insomnia (失眠),' he said.

单选题The best title for this text is ______.

单选题Though I haven't seen him for years, I can ______ his voice on the telephone.

单选题The growth (of) part-time and flexible working patterns (allow) more women (to) (take) advantage of employment opportunities.

单选题According to the old-timers, on two occasions ______.

单选题The new law allows you to ______ payment if you think a bill is incorrect.

单选题He doesn’t eat pork ,but ______that he’ll eat just about anything.

单选题Typically, these children of Democrats switched ______ and joined the Republican Party during the 1980s.

单选题Now ______ the words and phrases exactly as you hear them.

单选题There is a definite possibility that the climate of the world may be changing. Some scientists imagine that this could even mean the beginning of another ice age. The effects of such a change in climate on the human population of the world would be startling. Recent research suggests that the general warming trend of the past hundred years or so may be coming to an end. During the past ten years, meteorologists tell us the average temperature of the earth has dropped about one degree Fahrenheit. This does not seem like much, but it could have effects on wind and rain patterns which influence the overall weather picture. If these patterns change a lot, it could mean that certain regions of the world may continue to have long droughts while others will possibly suffer from widespread flooding. What regulates the climate is not exactly known. Meteorologists believe that clouds may be an important factor in regulating the amount of solar heat held by the earth, which in turn determines the temperature of the planet. Another possibility is that man"s industrial and agricultural methods may be affecting the natural weather patterns. However, the weather is not understood well enough for scientists to say for certain what is happening to the climate and what side effects this will actually have on the world"s population.

单选题Unable to speak a word of that language, he______with his hands.

单选题Many well-educated people don't believe that ______ will endanger freedom of speech.

单选题John said he wouldn't go to the party as he was busy, but he went there ______.

单选题The book contained a large ______ of information.

单选题Both Tom and Mary ______ the exam. A. has passed B. have past C. have passed D. had passed

单选题Is there something as truth? For a good many centuries "the search for truth" has been (31) the noblest activity of the human mind, but the seekers after truth have come to such (32) conclusions that it often seems that very little progress has been made. (33) , there are many people who reel that we are actually going backward. They (34) , often contemptuously, that we have accumulated more "knowledge" than our ancestors, but they think we are farther from the truth than ever, or even that we have (35) the truth that we once possessed. If people look for anything long enough without finding it, the question naturally arises (36) the thing is really there to find. You have seen a picture of an animal with a lion's head, a goat's body, and a serpent's tail--and maybe an eagle's wings for good (37) There is plenty of evidence that each part of this animal (38) --but there is no (39) evidence that the parts ever occur in this combination. It is at least conceivable that the seekers after "truth" have made a similar mistake and invented an (40) combination.