【推荐3】Scottsdale was a typical American suburb in the 1950s, with children going to each other’s houses to play, or riding their bikes around the neighbourhood. But for Steven Spielberg none of these “normal” activities were very excitmg. Instead he made his own entertainment, like the time he _______ his younger sisters that he had a dead body in his bedroom and almost frightened them to death.

When Steven was about seven years o1d, he developed a _______ for television, despite the _______ his parents made to control the children’s viewing. His father_______ placed hair on the television “ON” switch to know when Steven watched TV. But Steven would _______ its position and replace it after watching hours of television.

A chance finally came for Steven to _______ his ability to entertain with his enthusiasm for television. When his father received a movie camera for Father’s Day, the movies he took, according to Steven, were _______. Annoyed by his son’s_______ criticism (批评), he gave the camera to Steven.

Steven proved to be a(an) _______ with the camera and quickly made several films using his own toys as the performers. His parents were __________ by how life-like they were and so he began a magnificent movie career.

【推荐1】You are watching a film in which two men are having a fight. They hit one another _________. At the start they only fight with their hands, but soon they begin   _________ one another over the heads with chairs. It goes on until one of the men crashes (猛撞) through a window, and _________ to the ground below. He is dead!

Of course, he isn't really_________. With any luck he isn't even hurt. Why? _________ the men who fall out of high windows or jump from fast-moving trains, who crash cars or even catch fire, are professionals. They do this for _________. These men are _________   “stuntmen” (特技演员). That is to _________, they perform “tricks”.

There are two sides to their work. They _________ do most of the things you see on the screen. For example, they fall ____________ a high building. However, they do not fall on to hard ground ____________   on to empty cardboard boxes covered with a mattress (垫子).____________, when they hit one another with chairs, the chairs are made of soft wood and when they crash through windows, the “glass” is made of ____________.

Although their work depends on tricks of this kind, it calls for a____________ degree of skill and training. Often a stuntman's success depends on exact ____________. For example, when he is “blown up” in a battle screen, he has to jump out of the way of the explosion just at the right moment.

Naturally stuntmen are ____________ paid for their work, but they lead dangerous lives. They often get seriously hurt, and sometimes   ____________. A Norwegian stuntmen, for example, skied over the edge of a cliff (悬崖) a thousand feet high. His parachute (降落伞)____________ to open, and he was killed.

In spite of all the risks, this is ____________ a profession for “men only”. Men no longer dress up ____________ women when actresses have to perform some dangerous action. Nowadays there are “stuntgirls” too!

【推荐2】Trackers on Ice

Just because a scientist puts a GPS tracking collar on a wild polar bear does not mean the animal will obligingly keep it on．_______________, these huge collars are purposefully loose．If one becomes annoying, a bear can _______________ it．But scientists have now found a way to use _______________ from the discarded（丢弃的）devices．

"These dropped collars _______________ would have been considered garbage data," says Natasha Klappstein, a polar bear researcher at the University of Alberta．She and her colleagues instead used _______________ from such collars, left on sea ice in Canada's Hudson Bay, to track the ice itself．For their study, published in June in The Cryosphere, the researchers identified twenty collars that transmitted movement data in line with ice drift rather than polar bear _______________ between 2005 and 2015．The resulting records of how melting ice typically drifts in Hudson Bay are unique．There are no easily _______________ on-the-ground sensors, and satellite observations often cannot accurately capture the motion of small ice sheets．

The team _______________ the discarded collars' movements with widely used ice-drift modeling data from the U.S．National Snow and Ice Data Center（NSIDC）．Collar data indicated that the NSIDC model underestimates the speed at which ice moves around in Hudson Bay-as well as the overall _______________ of drift．Over the course of several months, the model could drift away from an ice sheet's location by a few hundred kilometers, the researchers say．

This means the bears may be working harder, when moving against the direction of the ice, than scientists had ________________: "Since we're underestimating the speed of drift, we're likely underestimating the energetic effort of polar bears," says Natasha Klappstein．The research reveals ________________ insight into how highly mobile ice moves．As melting increases in the coming years, such ice will likely become more ________________ farther north, in the central Artic．Scientists had known NSIDC data could underestimate drift speeds, but "any time we can find a data ________________, it is a good thing．"

Plus, such data could improve predictions about how oil spills or other pollutants may ________________ in seas．littered with drifting ice, says Walt Meier, a senior NSIDC research scientist, who was not involved in the study．The findings may even ________________ future NSIDC models: "It's a really nice data set," Meier says．"And certainly one we'll take under consideration．"

【推荐3】The term home schooling means educating children at home or in places other than a normal setting such as a public or private school. These days, homeschooling in America is ________.

Teaching methods at homeschooling ________. Some parents follow a strict timetable and ________ a traditional school environment. Other parents follow an extreme form of homeschooling in which they do not give grades or tests and allow their children to study wherever they want. More parents, however, follow the middle ________ to provide a balance between freedom and discipline.

Why do parents choose homeschooling? Some believe that children in public schools experience too much “peer pressure”, or social pressure from friends. They say it may have a ________ effect on the child’s studies. Other parents are dissatisfied with the quality of education in the public school. About half the parents who teach at home are ________ motivated and use lessons by mail or Internet from church schools. Whatever the ________ may be, it is evident that more and more children are being taken out of normal schools every year. ________, many questions have emerged, encouraging the debate over home schooling against public schooling.

What then is the future of education? Although children often learn well at home, weak regulations in most states mean that officials rarely challenge or ________ parents who say they are home-schooling. As the ________ continues, so do the questions about what home schoolers are studying at home. How can parents ensure that their children are prepared academically for college? How are home schoolers ________ to make sure they are getting the same educational standards that school students must have? Recent studies in the United States have shown that homeschooled children tend to be slightly better in subjects like English and art, but they are obviously less ________ math and science. Finally, there are questions regarding the children’s emotional development. Are they too ________ their fellow students? Are they ________ the opportunity to get the social benefits of being in a large classroom of students? As with any debatable issue, the answers to these questions are never ________.