It seems hard to watch someone yawn and not to yawn ourselves. Even reading about yawning can make you do it. Now, a new study has found why yawning has such a powerful force. Yawning when others yawn, the study suggests, is a sign of pity and a form of social connection. Kids don't develop this deeply rooted behavior until around age four, the study found. Kids with autism are less likely to catch yawns. In the most serious cases, they never do. Yawning might help doctors to see whether the children are developing rightly. The work could also lead to a better understanding of the ways that people communicate and connect. "Emotional infection seems to be a born thing that connects us together," said Molly Helt, a graduate student in psychology at the University of Connecticut. "Yawning may be part of that." Inspiration for her study came when she tried to get her own autistic son to clear his ears on an airplane. She repeatedly yawned at him, hoping he would yawn back. He never did. "The fact that autistic kids don't do it might mean they're really missing out on that emotional connection with people around them," she said. "The biggest thing people try to figure out after birth is how we become humans and understand that humans have minds that are different from others'," she added. "Autistic people never seem to understand that." Like infectious laughter and crying, scientists have found that yawning is a shared experience that promotes social connection. Helt said it could fight stress after a period of being nervous and spread a feeling of calm through a group. Which of the following is NOT true about yawning? A) It is natural to yawn back if people around you yawn. B) Some kids are too young to yawn after others. C) Yawning can be used to test children's development. D) Kids with autism yawn easily when others yawn.
D
(Question)
Isn't it cool to surf in summer? You catch a wave and enjoy the ride. Surfing is not only our favorite sport, though. A group of penguins enjoy the sport as much as we do. And they show their excitement and skills in the new animated film --Surf's Up, which came out on June 6, in the US. Cody loves the sport. Cody's idol is Big Z, a great penguin surfing king. Cody doesn't like his brother and his mother who are not supportive. He really wants to get away. Cody believes that winning a surfing competition will bring him admiration and respect. When Mikey Abromowitz, a talent scout , comes to Antarctica to look for talented penguins for a surfing competition, Cody's really excited, but during his show there are no waves and he _ . But he knows he can't give up. He runs after Mikey's whale and begs until Mikey agrees to take him. There Cody meets Lani, the island's beautiful lifeguard, as well as his main rival , the surfing champion Evans. The cocky Evans shows no respect for Big Z, which makes Cody angry. For this, he challenges Evans to a surfing match, only to suffer a terrible defeat. Lani takes Cody to the island doctor. As they spend time together, Cody realizes that this doctor is really Big Z himself. When he learns this, Cody begs him to train him and make him a better surfer. Cody begins to find his own way. Cody improves his skills with the help of Big Z and discovers that a true winner isn't always the one who comes in first. The passage mainly tells us _ . A) that winning can bring you good luck and respect B) how a penguin can be a good surfer C) about a new animated film --Surf's Up D) about the life of a teenage penguin called Cody
(Answer)
C
Ques: Sam, an unemployed piano tuner, said it was only the second thing he had ever won in his life. The first thing was an Afghan blanket at a church raffle when he was 25 years old. But this was much bigger: it was $120,000! He had won the Big Cube, a state lottery game. To win, a contestant must first guess which number a spinning cube will stop on. The cube has six numbers on it: 1X, 10X, 50X, 100X, 500X, and 1000X. If he is correct, the contestant must then guess which of two selected variables is going to be greater. So, just guessing which number appears on the cube does not guarantee that you will win any money. Sam correctly guessed 1000X, but he still had to choose between two variables. One variable was the number of cars that would run the stop sign at Hill Street and Lake Avenue in six hours. The other variable was the number of times that a teenage boy would change TV channels in a three-hour period. This was a tough decision. Finally, Sam flipped a coin. It came up heads, so Sam picked the teenager. He picked right. The stop sign was run only 76 times, but the teen clicked 120 times. Sixty-year-old Sam jumped for joy, for he had just won 1000 times 120, or $120,000. Sam dreamily left the lottery studio. Talking excitedly on his cell phone while crossing the street, he got hit by a little sports car. Sam is slowly getting better. He was in the hospital for a month. His hospital bill was $110,000. And the insurance company for the little sports car's owner sued Sam for $9,000 worth of repairs. Also, Sam still has to pay federal taxes on his winnings. Sam doesn't play the state lottery any more. He says it's better to be unlucky. Sam won the lottery because _ . A) he was lucky B) he was good at math C) he was smart D) he was tough
Ans: A
Question: Annealing is a way of making metal softer by heating it and then letting it cool very slowly. If metal is heated and then cooled very quickly , for example by dipping it in water , it will be very hard but also very brittle ---that is , It will break easily. Metal that has been annealed is soft but does not break as easily . It is possible to make metal as hard or as soft as is wished, by annealing it. The metal is heated, and allowed to cool slowly , for a certain length of time. The longer the heated metal takes to cool slowly , the softer it becomes . Annealing can also be used on other materials, such as glass. Why do people put hot metal in water ? _ A) To make it hard B) To make it soft C) To make it cool D) To make it brittle
Answer:
A