I'm taking a test and have to guess the right answer to the question after the article. Article: For thousands of years humans have used herbs , roots, and other things from nature to cure disease. Scientists looking for new cures often visit traditional healers. They find out what plants are used in healing. Then they look at what the plant contains. They find the active ingredient , which is the chemical in the plant that works to heal. Many of the drugs we use, including aspirin, have come from these natural medicines. In recent years, many people in the US have taking what are legally known as dietary supplements . They may be vitamins or minerals. They may be herbs that help with health problems, such as depression. Some of them are teas. Others are capsules or tablets. They are sold in natural food stores, drug stores, and groceries. Most people think that because these products are natural they are also safe. This is not always true. There are many plants that are poisonous. There are others that have bad side effects. The New England Journal of Medicine publishes medical research. A recent edition called for the government to _ dietary supplements. Several doctors wrote to the Journal and told of bad experiences people have had with dietary supplements. Dietary supplements aren't tested in the same way as drugs. There is not always proof that the supplement really does what it is supposed to do. There is also a problem with purity of the supplements. Supplements have been found to contain things that are bad for the body. For example, the California Department of Health found that of 260 herbs grown in China, one third contained heavy metals. These are minerals such as lead and mercury . They are very poisonous, even in tiny amounts. Question: The scientists study the cures from the healers in order to _ . Options: A: find out if the plant is poisonous B: find out what in the plant works to cure disease C: look for aspirin in the plant D: make sure that the plant can cure disease
B
(Question)
I'm taking a test and have to guess the right answer to the question after the article. Article: Car companies are developing vehicles that will plug into electric sockets,just like many laptops,digital cameras,cell phones and Mp4 do.Called"plug-in vehicles",these cars will get most of their power from electricity. Their drivers won't have to stop at gas stations as often as usual. The technology is more than just cool. In our car-filled world,plug-in vehicles could reduce the amount of gas we use,which keeps rising in cost now and then. Besides,driving around in these vehicles may even help the environment.Gas-burning cars produce a lot of greenhouse gas,which causes globe warming. The first company-produced plug-in vehicles could hit the roads by 2010. But engineers still have a lot of work to do to make the technology practical and inexpensive. Batteries are the biggest challenge. In the plug-in-vehicle world,Li-ion batteries are getting the most attention.These batteries can store a large amount of energy in a small package,and they last a longer time between charges.Li-ion batteries can fit laptops,cell phones,heart instruments and other similar pocket ones. But because cars are so big and heavy, it would still require a suitcase-sized Li-ion batteries to power about 12km of driving.What's more,the batteries are much expensive. "A car filled with batteries could go a long distance,"says Ted Bohn, an electrical engineer in Chicago."But it couldn't pull any people.and it would cost $100,000." So researchers need to work out how to make batteries smaller and cheaper,among other questions. "The answers don't exist yet,"Bohn says,"As a kid,I thought someone someplace knows the answer to everything.All of these questions haven't been decided.That's what engineering is about-making a guess,running tests and getting fine results." Question: The passage mainly talks about_of a new car Options: A: the developing B: the speed C: the appearance D: the batteries
(Answer)
D
I'm taking a test and have to guess the right answer to the question after the article. Article: The latest research suggests that the key factor separating geniuses from the merely accomplished is not I.Q., a generally bad predictor of success. Instead, it's purposeful practice. Top performers spend more hours practising their craft. If you wanted to picture how a typical genius might develop, you'd take a girl who possessed a slightly above average language ability. It wouldn't have to be a big talent, just enough so that she might gain some sense of distinction. Then you would want her to meet, say, a novelist, who coincidentally shared some similar qualities. Maybe the writer was from the same town, had the same family background, or shared the same birthday. This contact would give the girl a vision of her future self. It would give her some idea of a fascinating circle who might someday join. It would also help if one of her parents died when she was 12, giving her a strong sense of insecurity and fuelling a desperate need for success. Armed with this ambition, she would read novels and life stories of writers without end. This would give her a primary knowledge of her field. She would be able to see new writing in deeper ways and quickly understand its inner workings. Then she would practise writing. Her practice would be slow, painstaking and error-focused. By practising in this way, she delays the automating process. Her mind wants to turn conscious, newly learned skills into unconscious, automatically performed skills. By practising slowly, by breaking skills down into tiny parts and repeating, she forces the brain to internalize a better pattern of performance. Then she would find an adviser who would provide a constant stream of feedback, viewing her performance form the outside, correcting the smallest errors, pushing her to take on tougher challenges. By now she is redoing problems--how do I get characters into a room--dozens and dozens of times. She is establishing habits of thought she can call upon in order to understand or solve future problems. The primary quality our young writer... Question: The passage mainly deals with_. Options: A: the function of I.Q. in cultivating a writer B: the relationship between genius and success C: the decisive factor in making a genius D: the way of gaining some sense of distinction
C