题目列表(包括答案和解析)
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。
Many people believe that sugar is bad for their health; 1 say that sugar is the best source of energy．We also hear similar conflicting arguments about meat between vegetarians and meat-eaters．Who is right and what is your opinion? Are you easily influenced by one 2 of advice today and then by another one tomorrow?
Obviously, you might think that 3 (go)to extremes is not the right way, for the importance of having a variety of food in one’s diet is quite clear today．Scientists have again and 4 warned us that 5 lack of certain kinds of food is dangerous, 6 for children, because 7 a balanced diet, their body can’t grow properly．Scientists have also told us, “Having too much of anything, including one’s favorite food, is equally dangerous．”
They say, for example, children 8 eat lots of cheeseburgers and milk shakes will increase the risk of heart attack．
Therefore, it seems that perhaps the most intelligent thing for us to do is not to eat first but to read first． 9 (science)information about the body’s needs for fats and proteins, for minerals and vitamins, can help us decide on the right choice and the right amount．And it can also help us tell facts 10 misleading opinions．
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根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多途选项。
Laser(激光)is short for Light Amplification by Stimulated Emission of Radiation．Laser light is different from daylight or electric lights．Industry put lasers to work almost immediately after they were invented in nineteen sixty． 1 ．
The first medical operation using a laser took place the year following its invention．Doctors Charles Campbell and Charles Koester used a laser to remove a tumor from a patient's eye at Columbia-Presbyterian Hospital in New York City． 2 ．
Lasers have made measurement an exact science．Astronomers have used lasers to measure the moon's distance from Earth． 3 ．For example, drawing a perfectly level straight line on a construction site is easy using a laser．
4 ．And the jewelry industry uses lasers to write on the surface of the world's hardest substance, diamonds．
Lasers are found in many products used almost everywhere．Over one hundred years ago, writers imagined that beams of light could be powerful weapons．Today, lasers guide missiles and bombs．American defense companies are working on giant laser guns recognizable to science fiction fans everywhere． 5 ．
Scientific American magazine says huge lasers turn only about twenty to thirty percent of the energy they use into a laser beam．The rest is lost as heat．
That has not stopped scientists from working to perfect powerful lasers that, one day, may be able to shoot missiles out of the sky．
A．But weapons were not the first to use it on the list．
B．All lasers have several things in common．
C．Mappers and builders use laser technology every day．
D．But there are technological difficulties．
E．Lasers have also changed the way we communicate．
F．Manufacturers have used lasers for years to cut and join metal parts．
G．Since then, doctors have used lasers to cut and remove tissue safely with little risk of infections．
The little child was noticed the tall tree.
A.risk climbing B.risking to climb
C.to risk climbing D.to risk to climb
When Should a Leader Apologize and When Not？
Why Difficult？
When we wrong someone we know，even not intentionally，we are generally expected to apologize so as to improve the situation. But when we’re acting as leaders，the circumstances are different. The act of apology is carried out not only at the level of the individual but also at the level of the institution. It is a performance in which every expression matters and every word becomes part of the public record. Refusing to apologize can be smart，or it can be stupid. So，readiness to apologize can be seen as a sign of strong character or as a sign of weakness. A successful apology can turn hate into personal and organizational harmony—while an apology that is too little，too late，or too obviously strategic can bring on individual and institutional ruin. What，then，is to be done？How can leaders decide if and when to apologize publicly？
Why Now？
The question of whether leaders should apologize publicly has never been more urgent. During the last decade or so，the United States in particular has developed an apology culture—apologies of all kinds and for all sorts of wrongdoings are made far more frequently than before. More newspaper writers have written about the growing importance of public apologies. More articles，cartoons，advice columns，and radio and television programs have similarly dealt with the subject of private apologies.
Why Bother？
Why do we apologize？Why do we ever put ourselves in situations likely to be difficult，embarrassing，and even risky？Leaders who apologize publicly could be an easy target. They are expected to appear strong and capable. And whenever they make public statements of any kind，their individual and institutional reputations are in danger. Clearly，then，leaders should not apologize often or lightly. For a leader to express apology，there needs to be a good，strong reason. Leaders will publicly apologize if and when they think the costs of doing so are lower than the costs of not doing so.
Why Refuse？
Why is it that leaders so often refuse to apologize，even when a public apology seems to be in order？Their reasons can be individual or institutional. Because leaders are public figures，their apologies are likely to be personally uncomfortable and even professionally risky. Leaders may also be afraid that the admission of a mistake will damage or destroy the organization for which they are responsible. There can be good reasons for hanging tough in tough situations，as we shall see，but it is a high-risk strategy.
―→·Public apology is much more than a(an) 72 act.
·It’s no 73 job to strike a balance between apologizing or not.
·Apologies not 74 offered can bring on individual and institutional ruin.
―→ ·In an 76 ， admission of all sorts of wrongdoings is more required than before.
·The 77 of public apologies has been widely reported in the mass media.
―→ ·Being public figures， leaders are supposed to appear 78 .
·There needs to be a sufficient reason for a leader to 79 in public.
―→ ·Making apologies is likely to be personally uncomfortable and 80 .
·Admission of a mistake or wrongdoing will probably do 81 to their organization.
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