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¡¾1¡¿Without my _______ (permit), no one is allowed to enter the room.

¡¾2¡¿A sound sleep is always regarded ________ (benefit) to our fitness.

¡¾3¡¿________ (theory) speaking, your suggestion is practical.

¡¾4¡¿It is really _______ (ÌåÌùÖܵ½µÄ) of you to heat the room in advance.

¡¾5¡¿The Peking Opera performance last night was really _______(impress).

¡¾6¡¿Having dinner with children is a valuable way to _______ (strong) family bond (¼ÒͥŦ´ø).

¡¾7¡¿As we all know, a _______ (balance) diet is of great use for our health.

¡¾8¡¿Tom opened the box out of _________ (ºÃÆæÐÄ).

¡¾9¡¿While crossing a road, you must pay attention to the _______ (surround), such as the traffic lights.

¡¾10¡¿Tom _______ (apology) to me for his rudeness but I refused to accept it.

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¡¾ÌâÄ¿¡¿ A high school student has a science test on Monday but spends most of the weekend playing video games and does not start studying until late Sunday night. This kind of avoiding or delaying of work that needs to be done is called procrastination(ÍÏí³). It has been said that up to 95% of people procrastinate at least sometimes, and about 20% of them do it too much. ¡¾1¡¿

The first factor is how pleasant or unpleasant people find a task. Research shows that people put off tasks they find unpleasant. Someone who loves bicycles might not delay fixing a tire, while someone who does not may put it off.

¡¾2¡¿ For example, those who have low expectations of success are more likely to delay starting a job. On the other hand, those who believe they can perform well take on challenging tasks rather than avoid them.

¡¾3¡¿ Studying hard in high school might not give high school students any immediate rewards; what they learn might not seem useful to the present. Sometimes. it is hard to see the benefit of making an effort when the reward is too far away. ¡¾4¡¿

Lastly, another factor is whether or not people can use self-control. Those who have less self-control can easily be drawn away from their work. Interestingly, age is said to be associated with self-control. ¡¾5¡¿

If procrastination is a problem for you, the first step to reducing it is identifying the reasons behind it. It is only by understanding the roots of your problem that you can choose the appropriate method for yourself.

A. Besides, there is a link between procrastination and how long people must wait before they see the reward for an effort.

B. Research shows that the older people become, the less likely they are to delay doing their work until the last minute.

C. In addition, the amount of confidence they have in their ability to do a task is also related to procrastination.

D. As it is common to most people, how to avoid procrastination has become a major concern.

E. What's more, it has been argued that too much confidence can also lead to procrastination.

F. Although researchers do not agree on all the reasons behind procrastination, there is general agreement about some factors that can explain it.

G. This can explain why many people do not start saving money for their old age when they are young.

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Clowns (С³ó)are almost everywhere in popular culture. But what they represent ¡¾1¡¿(change) a lot over the past 400 years.

Clowns began appearing in ¡¾2¡¿ form we recognize today in European theaters in the 17th century. With brightly colored clothes, big red noses and colorful faces, clowns tried every means to act foolish or play tricks ¡¾3¡¿ (make) the audience laugh.

Clowns became popular in the US in the 1960s. A happy clown ¡¾4¡¿ (choose) by McDonald's to appear in its advertisements. Today, as we know, that company mascot (¼ªÏéÎï)£¬ Ronald McDonald, is world famous.

However, the image of a happy clown is largely an American creation. In other cultures, the clown character is not ¡¾5¡¿ (necessary) good. One example is ¡°Mr. Punch¡±, who was popular in British and French theaters during the 1700s. While Mr. Punch was funny, he was also violent, often ¡¾6¡¿ (hit) his wife during the show, ¡¾7¡¿ gave rise to the name of ¡°bad clowns¡±. Even today, in the eyes of some people, clowns are evil (а¶ñµÄ)and ¡¾8¡¿ (frighten).

Of course, there are different voices. Some people think clowns are positive, creative and imaginative. They bring people ¡¾9¡¿ (please) and laughter. That's ¡¾10¡¿ attracts people, especially children, to clowns. They believe that as long as there are children in the world, there will be a future for clowns.

¡¾ÌâÄ¿¡¿ A new urban sport, parkour, is hitting the streets. It has evolved from obstacle course training into a fitness option for young people. In parkour, the outside world is the gym! ¡¾1¡¿ The goal of parkour is a direct route from one place to another. You meet an obstacle, you overcome it.

Mark Toorock, who teaches the techniques of parkour at his fitness gym, says that parkour is a method to train the body and mind using obstacles as the medium. He says that this new sport is demanding and takes years to master. ¡¾2¡¿

But Toorock, who used to be a martial arts expert, says that everyone can benefit from learning the basic skills involved in parkour like running, jumping and crawling (ÅÀÐÐ). These are the things that humans used to have to do all the time. ¡¾3¡¿ The original idea of parkour was to return to running and jumping as basic elements in moving from one place to another.

Georges Hebert, a French navy officer, was so impressed by the effortless athleticism of African tribes that he devised a training method based on running, climbing, jumping, balancing and throwing. The word parkour comes from parcours de combatant, the French term for a military obstacle course. ¡¾4¡¿

Dr Kenneth Kao explains that the sport of parkour is not extreme ¡ª it is the environment which is extreme and dangerous. Being outside, jumping off railings and flipping over park benches can be quite frightening, so parkour courses in gyms concentrate on practicing all the individual moves to make everything easier. ¡¾5¡¿ However, that is not real parkour because it¡¯s indoors with a fixed obstacle. The goal for everyone is to go outdoors.

A.Gyms provide thick floor matting (µæ×Ó) for rolling and rubberized boxes for jumping over.

B.The bridges, buildings and railings (À¸¸Ë) of each and every city are the equipment.

C.Every action in parkour is natural, so everyone must have the ability to move in this way.

D.Parkour was introduced into china in recent years and has gained popularity.

E.But today, due to modern transport, these basic skills are no longer used on a regular basis.

F.The French word for people who participate in the sport is traceurs or traceuses.

G.Beginners should realize that they won¡¯t be jumping over buildings any time soon!

¡¾ÌâÄ¿¡¿ A breathtaking trick potentially left over from our ancestors might be found in us ¡ª the ability to sense oxygen through our skin.

Amphibians, animals such as frogs that can live both on land and in water, have long been known to be capable of breathing through their skin. In fact, the first known lungless frog that breathes only through its skin was discovered recently in the rivers of Borneo.

Now the same oxygen sensors found in frog skins and in the lungs of mammals (²¸È鶯Îï) have unexpectedly been discovered in the skin of mice.

¡°No one had ever looked,¡± explained Randall Johnson, a biologist researcher.

Mice and frogs are quite distant relatives, so the fact they have these molecules (·Ö×Ó) in common in their skin suggests they might well be found in the skin of other mammals, such as humans.

¡°We have no reason to think that they are not in the skin of people too,¡± Johnson said.

These molecules not only detect oxygen, but help increase levels of vital red blood cells, which carry oxygen around the body. Normal mice breathing in air that is 10 percent oxygen¡ªa dangerously low level similar to conditions at the top of Mount Everest, and about half that of air at sea level. However, mice that had the oxygen sensor HIF-1a genetically removed from their skin failed to produce this hormone (ºÉ¶ûÃÉ) even after hours of such low oxygen.

These findings, if they hold true in humans, suggest one could raise the level of oxygen circulating inside the body. This could help treat lung diseases and disorders such as anemia (ƶѪ֢) without injecting drugs, which make up a multibillion-dollar market, Johnson said.

Athletes also often try to get more oxygen delivered to their muscles in order to improve their performance. They often do this by training at high altitudes or in low-oxygen tents. The new study suggests they might want to expose their skin as well as breathing in low-oxygen air to improve their performance. ¡°It¡¯s hard to say what exactly might be done, however¡ªthere¡¯s a lot we don¡¯t know yet,¡± Johnson explained.

The scientists detailed their findings in the April 18 issue of the journal Cell.

¡¾1¡¿Which of the following statements is TRUE according to the passage?

A.Johnson believes that Oxygen sensors also exist in human skin.

B.People have to surf the Internet to read detailed findings.

C.It has been proved that these findings help treat lung diseases.

D.It has long been expected oxygen sensors exist in mice¡¯s skin.

¡¾2¡¿One of the functions of the molecules mentioned above is _______.

A.carrying oxygen around the bodyB.improving athletes¡¯ performance

C.detecting oxygenD.increasing level of oxygen

¡¾3¡¿What is Johnson¡¯s attitude to the application of the findings to the athletes¡¯ training?

A.NegativeB.Doubting

C.PositiveD.Hesitating

¡¾4¡¿The best title of the passage may be _______.

A.Great Findings Benefits Athletes A Lot

B.Frogs And Mice Are Distant Relatives

C.First Known Animal Breathes Through Skin

D.Humans Might Sense Oxygen Through Skin

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