5 . Imagine that you're an insect，and that you have fallen ill because some bacteria or parasites have attacked your body. If you want to make it to a ripe old_______age，your body will need to fight off these_______.

The problem is that if you're an insect，your_______span may be only a few days long. This means that _______humans，you simply don't have the time to relax yourself in bed，watching TV and waiting for your body to_______how to fight off each disease it comes across.

Still，there's no reason for your insect self to be_______and thus lose calmness. Evolution has_______you with what scientists call inborn immunity，which you take over from your parents. Inborn immunity means that your bug body has the power to_______recognize and destroy many_______enemies.

In your bug body there is a fluid called hemolymph（血淋巴），which is________to human blood. If you're________，elements in the hemolymph interact with specialized cells in your immune system to thicken and form a hard dry covering over the________of the wound that locks your wound and prevents infection. The hemolymph also contains proteins that are ready to________enemies like bacteria or fungi. However，some attackers，like tiny parasitic insects，may be too large for the proteins to________.

In this case，your body encloses the enemy and walls it off from the rest of the body. The enveloped enemy then stays inside you for the rest of your________insect life，or until you fly into a windshield，whichever comes first.

6 . American parents usually think that their child should not have more pocket money than the children with whom he regularly connects even if they are wealthier. But neither are children expected to_______with the richer if a large family, heavy responsibilities, or other conditions make it_______to give a child less spending money than is customary in the neighborhood.

Whatever the pocket money is, its entire use is not controlled by the_______, because a child learns to use money correctly only through_______the pocket money himself. If a seven-year-old child gets a quarter as a week pocket money and is made to put it all in his piggy bank to save it up, he gets no idea what the_______use for the money is. He gets the shiny coins and they soon_______.

The idea of a bank account is too early for so_______a child, although he can be made to understand and_______ saving his coins—not all of them, only a part of what he receives—to buy something he especially wants. By the time he is eight, when he is old enough to take part in the opening of his own saving account, parents may take him to the bank, open a saving account for him, and_______him to put a certain quantity of any checks that he receives as________into the bank and watch his bank savings________as entry by entry is made.

He will be saving, earning, and spending________quantities all along in order to learn how to________money and to keep him in a favorable position with his friends. The boy who can't join his fellows in sweet shops________he has to save every cent he gets or earns for some big unknown project his parents have been chosen for him, is a ________child.

7 . When we think about scientists and their great discoveries and inventions, we often think about strange men in white coats_______hours and days and years in their laboratories trying to solve a problem. However, if you believe the stories, there are times when a scientist makes a_______in a moment of inspiration, perhaps when he is no even_______the problem. Let's look at three famous scientists, Archimedes, Isaac Newton and James Watt, who, according to well-known stories, had moments of inspiration.

The story of Archimedes is perhaps the best known. According to the story, Archimedes was lying in his bath one day when he noticed water_______from the bath. He suddenly realized that there must be a_______between his body weight and the water overflowing from the bath. He was so_______that he jumped out of the bath and ran naked down the street shouting "Eureka"! In Greek, the language which Archimedes spoke, "Eureka" means "I have found it". Archimedes was right to be excited because he had discovered the principle of why some things float and others_______. This principle has now been_______in shipbuilding for centuries.

The story about Isaac Newton is well known too. According to this story, Newton was resting under an apple tree one day when an apple fell on his head. Newton realized that there must be a_______which had caused the apple to drop rather than stay________in the air. He also realized that this force must work even at the top of a very tall tree and thought that the force might even work in the skies and in space.________, Newton had discovered the law of gravity.

As for James Watt, it is said that he was boiling a kettle of water one day to make a cup of tea. When the water started to boil he noticed that the lid of the kettle began to move.________even the whole kettle was moving. This made him think about the idea of steam power. This discovery________the invention of steam engines, and then the steam train.

Why don't we all get these moments of inspiration? We have to remember that Archimedes, Newton and Watt were probably not thinking about these________for the first time. The bath, the apple and the kettle were the final ________in the thinking process. What is also remarkable about all three men is that they were able to see how the principles they had discovered could be used. Remember the saying, "Genius is 99% perspiration and 1% inspiration".

8 . Theatre is one of the oldest forms of entertainment. It usually depends on telling a story or demonstrating a theme using actors. With theatre, each_______is live and different.

Plays were staged in Ancient Greece over 2, 500 years ago. In the days of Ancient Greece and Rome, thousands of people went to see dramas in huge open-air theatres like the one in Athens. Actors usually wore huge_______. They performed not only comedies, but also_______with terrible deeds and strong emotions. In the Middle Ages, early dramas were often_______and staged in churches._______, mystery plays told Bible stories in a dramatic and colorful way.

It was in the 1570s that the first real_______appeared. In England, there were wooden-Os like the Globe Theatre in London. These were round wooden buildings with the_______and an audience pit (戏院的正厅后座) in the centre, open to the sky. Here_______and enthusiastic crowds watched professional_______perform the dramatic new plays of playwrights like William Shakespeare (1564-1616) who wrote such famous plays as Hamlet and Romeo and Juliet, Christopher Marlowe (1564-1593) and Ben Jonson (1572-1637). In Spain, people crammed into open courtyard theatres called corrales. This time is called the “__________age” of Spanish drama, for thousands of wonderful plays were written and performed. These theatres, though, were open-air. It was not until the late 1600s that theatres were__________.

Many early plays were about__________and kings and were set in exotic locations. But in the last 100 years, playwrights have written more about__________characters and situations. In the 1960s, many plays were kitchen sink dramas, showing life in very ordinary homes.

Today, banks of lights help the actors create the right__________. Lights can be made any color with a filter or gel in front of the lens. The stage in older theatres is often set behind a large frame, and curtains open to__________it at the start of the play. In many modern theatres, the stage is surrounded by the audience on three sides or all four.

9 . A young man has just returned from a terrific first date. He wants to send flowers to let his date know he enjoyed being with her, but he's not sure what to send. A dozen red roses? No, too formal for a first date. A bouquet of wild flowers, perhaps? Still not sure, he picks up the phone and calls a florist for advice. The next day his date calls, thanking him for the beautiful yellow roses.

Florists enjoy helping people express themselves with flowers. Flowers can help, people share all sorts of feelings. For instance, flowers help people say "Congratulations!" to a friend who gets promoted. Flowers can also express feelings hard to put into words. They help say "I'm sorry" to the wife whose husband forgot her birthday. From birth to death, and the holidays in between, flowers add color and meaning to life. That's why florists' services are always in demand.

In the past, florists just sold flowers to customers, who arranged them on their own. But today's florists are skilled designers, arranging flowers in ways that best express their customers' feelings.

Formerly, florists learned on the job. Today, however, many florists earn diplomas in floral design in as few as 75 hours of classes. They gain a knowledge of flower varieties and develop an artist's touch. These skills help florists make arrangements that fit customers' tastes and meet their budgets.

Compared to most start-up businesses, opening a flower shop takes little money. As a result, many florists open up their own shops soon after earning their diplomas.

One of their first priorities is establishing good customer service. Their customers have come to expect same-day delivery. So florists must be able to work quickly, especially during holiday rushes. But florists don't mind. For them, the more arrangements they make, the more people they touch-with flowers.

10 . Many parents, teachers, and politicians assert that preschool is the best way to prepare children to learn. There is no real agreement, however, about how this_______should be achieved.

For some, early childhood education_______the development of the whole child. They think that preschool should be play that encourages exploration and_______.Group activities teach_______social behaviors such as sharing, kindness, and patience. Time spent alone encourages_______. Learning letters and counting is important only for children who show an interest in them. Advocates of this_______stress that each child is unique and should learn at his or her own pace.

Other people cite research showing that children are ready to_______basic academic concepts by age 3 or 4. They claim that early_______to letters and numbers lays the foundation for later academic excellence. Since the 1980s, many people have stressed the value of preschool and point to the success of programs—such as Head Start—that target low-income children.

Is there proof that an academic curriculum in preschool will lead to academic success? Studies have not been _______.

In the short term, evidence suggests that middle-class children who attend preschool are________their peers in math and language skills, as well as in social skills, when they enter school.________, the same studies show that the gap________considerably by the time children reach age 8.

Children living in________are a different matter. Those enrolled in programs such as Head Start seem to do better than needy children who do not attend a preschool. For instance, youngsters in one group enrolled in the program,________until the age of 21, earned higher scores on intelligence tests, were more likely to graduate from high school, and demonstrated more interest in higher education.

The idea of public preschools raises many issues. Providing Head Start for all children would be a________burden on communities that already struggle to fund current school programs. Also, where would a sufficient number of teachers trained in early childhood development be found?