School teachers have to be flexible to cope with different ability levels of the students.




Crop yields vary, improving in some areas and falling in others.




I don’t feel inferior to anyone with respect to my education.




Sometimes we ________ money long before the next payday.
























A:Hey! How did your geography test go? B:Not bad, thanks. I’m just glad that it’s over! How about you? How did your science exam go? A:Oh, it went really well. _______________________. I owe you a treat for that. B:It’s my pleasure. So, do you feel like preparing for the math exam scheduled for next week? A:Sure. Let’s study together. B:It sounds good. See you later.




For people who are blind, everyday tasks such as sorting through the mail or doing a load of laundry present a challenge. ---- (A)That’s the thinking behind Aira, a new service that enables its thousands of users to stream live video of their surroundings to an on-demand agent, using either a smartphone or Aira’s proprietary glasses. (B)But what if they could “borrow” the eyes of someone who could see? (C)The Aira agents, who are available 24/7, can then answer questions, describe objects or guide users through a location.




The comparison of the heart to a pump, however, is a genuine analogy. ---- An analogy is a figure of speech in which two things are asserted to be alike in many respects that are quite fundamental. Their structure, the relationships of their parts, or the essential purposes they serve are similar, although the two things are also greatly dissimilar. Roses and carnations are not analogous. (①) They both have stems and leaves and may both be red in color. (②) But they exhibit these qualities in the same way; they are of the same genus. (③) These are disparate things, but they share important qualities: mechanical apparatus, possession of valves, ability to increase and decrease pressures, and capacity to move fluids. (④) And the heart and the pump exhibit these qualities in different ways and in different contexts.




One of the areas where efficiency can be optimized is the work force, through increasing individual productivity―defined as the amount of work (products produced, customers served) an employee handles in a given time. In addition to making sure you have invested in the right equipment, environment, and training to ensure optimal performance, you can increase productivity by encouraging staffers to put an end to a modern-day energy drain: multitasking. Studies show it takes 25 to 40 percent longer to get a job done when you’re simultaneously trying to work on other projects. To be more productive, says Andrew Deutscher, vice president of business development at consulting firm The Energy Project, “do one thing, uninterrupted, for a sustained period of time.”




The skill to have a good argument is critical in life. But it’s one that few parents teach to their children. ①We want to give kids a stable home, so we stop siblings from quarreling and we have our own arguments behind closed doors. ②Yet if kids never get exposed to disagreement, we may eventually limit their creativity. ③Children are most creative when they are free to brainstorm with lots of praise and encouragement in a peaceful environment. ④It turns out that highly creative people often grow up in families full of tension. They are not surrounded by fistfights or personal insults, but real disagreements. When adults in their early 30s were asked to write imaginative stories, the most creative ones came from those whose parents had the most conflict a quarter-century earlier.




Christopher Nolan is an Irish writer of some renown in the English language. Brain damaged since birth, Nolan has had little control over the muscles of his body, even to the extent of having difficulty in swallowing food. He must be strapped to his wheelchair because he cannot sit up by himself. Nolan cannot utter recognizable speech sounds. Fortunately, though, his brain damage was such that Nolan’s intelligence was undamaged and his hearing was normal; as a result, he learned to understand speech as a young child. It was only many years later, though, after he had reached 10 years, and after he had learned to read, that he was given a means to express his first words. He did this by using a stick which was attached to his head to point to letters. It was in this ‘unicorn’ manner, letter-by-letter, that he produced an entire book of poems and short stories, Dam-Burst of Dreams, while still a teenager.




In many Catholic countries, children are often named after saints; in fact, some priests will not allow parents to name their children after soap opera stars or football players. Protestant countries tend to be more free about this; however, in Norway, certain names such as Adolf are banned completely. In countries where infant mortality is very high, such as in Africa, tribes only name their children when they reach five years old, the age in which their chances of survival begin to increase. Until that time, they are referred to by the number of years they are. Many nations in the Far East give their children a unique name which in some way describes the circumstances of the child’s birth or the parents’ expectations and hopes for the child. Some Australian aborigines can keep changing their name throughout their life as the result of some important experience which has in some way proved their wisdom, creativity or determination. For example, if one day, one of them dances extremely well, he or she may decide to re-name him/herself ‘supreme dancer’ or ‘light feet’.




In one study, done in the early 1970s when young people tended to dress in either “hippie” or “straight” fashion, experimenters donned hippie or straight attire and asked college students on campus for a dime to make a phone call. When the experimenter was dressed in the same way as the student, the request was granted in more than two-thirds of the instances; when the student and requester were dissimilarly dressed, the dime was provided less than half the time. Another experiment showed how automatic our positive response to similar others can be. Marchers in an antiwar demonstration were found to be more likely to sign the petition of a similarly dressed requester and to do so without bothering to read it first.




Duration shares an inverse relationship with frequency. If you see a friend frequently, then the duration of the encounter will be shorter. Conversely, if you don’t see your friend very often, the duration of your visit will typically increase significantly. (A), if you see a friend every day, the duration of your visits can be low because you can keep up with what’s going on as events unfold. If, however, you only see your friend twice a year, the duration of your visits will be greater. Think back to a time when you had dinner in a restaurant with a friend you hadn’t seen for a long period of time. You probably spent several hours catching up on each other’s lives. The duration of the same dinner would be considerably shorter if you saw the person on a regular basis. (B), in romantic relationships the frequency and duration are very high because couples, especially newly minted ones, want to spend as much time with each other as possible. The intensity of the relationship will also be very high.




One of the most frequently used propaganda techniques is to convince the public that the propagandist’s views reflect those of the common person and that he or she is working in their best interests. A politician speaking to a blue-collar audience may roll up his sleeves, undo his tie, and attempt to use the specific idioms of the crowd. He may even use language incorrectly on purpose to give the impression that he is “just one of the folks.” This technique usually also employs the use of glittering generalities to give the impression that the politician’s views are the same as those of the crowd being addressed. Labor leaders, businesspeople, ministers, educators, and advertisers have used this technique to win our confidence by appearing to be ______________________________.




As a roller coaster climbs the first lift hill of its track, it is building potential energy—the higher it gets above the earth, the stronger the pull of gravity will be. When the coaster crests the lift hill and begins its descent, its potential energy becomes kinetic energy, or the energy of movement. A common misperception is that a coaster loses energy along the track. An important law of physics, however, called the law of conservation of energy, is that energy can never be created nor destroyed. It simply changes from one form to another. Whenever a track rises back uphill, the cars’ momentum—their kinetic energy—will carry them upward, which builds potential energy, and roller coasters repeatedly convert potential energy to kinetic energy and back again. At the end of a ride, coaster cars are slowed down by brake mechanisms that create __________ between two surfaces. This motion makes them hot, meaning kinetic energy is changed to heat energy during braking. Riders may mistakenly think coasters lose energy at the end of the track, but the energy just changes to and from different forms.




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