I'm taking a test and have to guess the right answer to the question after the article. Article: Imagine what you could do with a machine that could make things disappear. For inspiration, you could read some books. In the books of J.R.R. Tolkein, Bilbo Baggins finds a ring that can make him disappear. Of course, there's also poor Harry Potter, who used his invisibility cloak to hide from danger. Now that you've got some ideas, it's time for the hard part: building the cloak. To do that, you have to give up science fiction and turn to real science. An invisibility cloak has to cheat anything or anyone who might be watching. In order to understand how something can be seen, it's important to understand how we see. Human beings can only see objects that reflect light waves. These waves enter the eye and are then processed by the brain. However, if an object doesn't reflect light, then the waves don't enter the eye, and the brain doesn't process. So building an invisibility cloak is building something that doesn't reflect light. Cummer was part of a team of scientists from Duke University, including David Smith and David Schurig, who built the world's first version of an invisibility cloak. They had been inspired by the work of a British physicist, John Pendry. He in May said that an invisibility cloak was possible and Pendry was not the only one thinking about a disappearing act. At the same time, a Scottish physicist, UIf Leonhardt published a paper on building invisibility equipment. "It wasn't easy," says Cummer. "As often happens in science and research, it didn't work very well the first time. That first cloak didn't work like Harry Potter's --- the scientists didn't actually see anything disappear. So the research is still under way. " Question: What can be the best title for the text? Options: A: The Science of Disappearing B: The Hardest Part of Building a Cloak C: The Invention of an Invisibility Cloak D: Turn Science Fiction into Real Science
C
I'm taking a test and have to guess the right answer to the question after the article. Article: A New Headphone The answer to a very great noise may not be blocking it out with earplugs but taking that noise and bearing it as its own game. Earplugs have been the simple but effective way to stop noise affecting your mind, but their shortcoming is that they also block out sounds you may want or need to hear, such as music or someone talking to you. The answer to this problem is " active noise cancellation " headphones that are made up of a microphone and electronics that take all background low-frequency noise, turn the sound waves upside down and rebroadcast them into your ears. The result is that all the unwanted noises around are blocked out. In effect, one set of electronically produced around wave has sucked away the unwanted sound waves of noise. Stand next to a busy road wearing the noise cancellation headphones and the traffic noise disappears. Sit in an airplane and the engine noise dies away. In a noisy office, the noise of office equipment, people and air-conditioning is gone. You can still , however, hear music or people talking because that sound does not have a regular pattern and so the device does not block it. Question: Suppose you are driving your friend to the airport and the car radio is on, what can't you hear if you wear a headphone? Options: A: The radio music and the car engine noise. B: The noise of the planes passing overhead and what your friend says. C: The radio music and what your friend says. D: The nose of the car and the planes passing overhead.
D
Q: I'm taking a test and have to guess the right answer to the question after the article. Article: The following is a true story. It happened in the northern end of Queensland, Australia, where all kinds of animals live in the forest. Lisa, a 33-year-old woman, went to prepare lunch in the kitchen, leaving Barney, her three-year-old son, playing by himself in the back garden. Suddenly, a sharp cry of Barney came into the mother's ears, and Lisa rushed into the backyard in a hurry and found a big snake entwining the little child with its terrible body and trying to eat the boy as its delicious dish! It was a boa ! Lisa was terrified and quite angry. She made up her mind to save her son from the snake's mouth. It was fearless mother love that made Lisa forget what she faced. She took up an old hoe from the ground and beat the boa with all her might. One...two... With the hoe, Lisa beat the snake repeatedly, but useless. The little boy's voice and breath were getting weaker and weaker. Lisa's heart was broken and she got nearly mad. Suddenly Lisa put away the hoe and threw herself to the boa, opening her mouth and bit into the boa's back as if trying to eat a rare steak . Lisa was really mad! Blood was spurting out of the boa's body and covered most of Lisa's body. The boa was so badly wounded that it let go of Barney and moved back into the forest hurriedly. It had never known how a man had such terrible sharp teeth! On halfway home, the boa died. It was fearless mother love that saved the little boy. Question: Lisa failed in fighting against the boa at first just because _ . Options: A: she was bitten by the boa B: the boa was too strong C: the hoe was too sharp D: she was afraid that she would hurt her son
A: B
Q: I'm taking a test and have to guess the right answer to the question after the article. Article: The fighting against youth smoking since I took office I've done everything in my power to protect our children from harm. We've worked to make their streets and their schools safer, and to give them something positive to do after school before their parents get home. We've worked to teach our children that drugs are dangerous, illegal and wrong. Today, I want to talk to you about the historic opportunity we now have to protect our nation's children form an even more deadly threat: smoking. Smoking kills more people every day than AIDS, alcohol, car accidents, murders, suicides, drugs and fires combined. Nearly 90 percent of those smokers lit their first cigarette before they turned 18. Consider this: 3,000 children start to smoke every day illegally, and 1,000 of them will die sooner because of it. This is a national tragedy that every American should be honor-bound to help prevent. For more than five years we've worked to stop our children from smoking before they start, launching a nationwide campaign to educate them about the dangers of smoking, to reduce their access to tobacco products, and to severely restrict tobacco companies from advertising to young people. If we do these, we'll cut teen smoking by almost half over the next five years. That means if we act now, we have it in our power to stop 3 million children from smoking and to save a million lives as a result. Question: How many children start to smoke every day illegally? Options: A: 1,000 B: 3,000 C: 90 D: 18
A: B