Read the following article and select the best answer. Article: To help the environment, many Americans have made the change from paper and plastic bags to reusable grocery bags. But a report by a Florida newspaper says that reusable grocery bags sold by some supermarkets contain high levels of lead . Lead is a metal that can be harmful to humans, especially young children. Now, Senator Charles Schumer is asking the US government to investigate the use of lead in reusable shopping bags. "When our families go to the grocery store looking for safe and healthy foods to feed their kids, the last thing they should have to worry about is poisonous bags." Schumer said, "A quick investigation will allow everyone to make informed, timely decisions." Schumer added. Lead in the bags is not likely to rub off on food. But over time, paint on the bags can chip and the bags can wear out. When this happens, lead can be released . The Tampa Tribune newspaper said certain bags sold at Publix and Winn-Dixie supermarkets had lead levels that were a concern to health officials. The affected bags were found in Florida. But Publix has more than 1,000 stores in Alabama, Florida, Georgia, Sough Carolina and Tennessee. Publix says that all of its bags are under current laws about lead content, but that they have asked the makers of the bags to reduce the lead levels in the product. The bags with the highest levels of lead had fancy designs and many pictures. Plain reusable bags without decoration were found to contain little lead. Consumers worried about lead levels in reusable bags can change to cloth or string bags. Paper bags are also a good choice, since paper can be recycled . Since 2007, Publix supermarkets have sold more than 13 million reusable bags. The store says because shoppers have made the change to reusable bags, it has saved more than 1 billion paper and plastics bags. Question: The shopping bags containing high levels of lead _ . - have been reported by a newspaper - have been stopped by the government - have stopped people from using reusable bags - have caused serious health damage to customers
have been reported by a newspaper

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Read the following article and select the best answer. Article: Deception is something that people do all the time ,and it plays an important role in military strategy. Now some researchers are trying to figure out how to get robots to do it, by looking at the behavior of squirrels and birds. At Georgia Tech, a team led by Ronald Arkin , a professor at the School of interactive Computing, studied the literature on squirrels hiding their acorns .Squirrels will hide their food m a certain place, but when they see other squirrels trying to steal from them, they attempt to fool the thieves by running to a fake location. Ronald Arkin and his Ph. D. student Jaeeun Shim used that as a model for robot behavior. They programmed the robot into tricking a "predator " machine by doing what ei squirrel does: showing the enemy a false location for an important resource. The team also looked at how other animals in this case,a species of bird called Arabian babbler~ drive off predators. A babbler will make an alarm call when they see a predator and other babblers will join the bird and make more calls. They then surround the predator, all the while flapping wings and making noises. The babblers don't ever actually fight the animal they want to drive off; they just make enough noises and flaps around enough so that it seems that attacking a babbler isn't worth it They found that the deception works when the group reaches a certain size--essentially, when enough birds arrive to convince the enemy that it's best to back off . Davis modeled that behavior in software using a military scene and found that it worked even if the group didn't have the firepower to confront the enemy directly. The military is interested in this because a robot that can fool an opponent is a valuable tool. It could lead an enemy down a fake trail or make itself look more dangerous than it actually is. Question: What is the main idea of the passage? - Animals' behaviors are researched to be applied to the study of military robots. - Robots, fooling tricks are applied to the study of animals'behaviors. - Birds and squirrels are the animals that are good at deception. - Researchers are interested m animals'military-related behaviors.
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Animals' behaviors are researched to be applied to the study of military robots.

Ques: Read the following article and select the best answer. Article: Whether it is Mozart or Miley,your choice of music could determine whether you will perform well al your work. A new study suggests that listening to music in the office improves the speed and accuracy of tasks such as data entry,proof reading and problem solving. In an office-based experiment,88 pet cent of participants were found to produce their most accurate work when listening to music. The study also found that 81 per cent completed their fastest work when music was played. And it matters what type of music you listen to.For instance,if you're doing your tax returns,then classical music is the most effective as it improves maths skills. Listening to Jessie J or Justin Bieber could also improve your speed,with 58 per cent of participants completing data entry tasks faster while listening to pop songs. During proof-reading,dance music,such as David Guetta,had the biggest positive impact with participants increasing their speed by 20 per cent compared to tests undertaken with no music at a11. Dance music also had a positive effect on spell-checking with a 75 per cent pass rate compared to 68 percent when no music was played al a11. The research,undertaken by Brighton-based Mindlab International,suggests that silent offices may be the least productive. "The music experiment showed that when listening to music,nine out of 10 people performed better,"said Dr.David Lewis.Chairman of Mindlab International. "Proper music enables people to quickly process and keep information,regulate their behaviors,make good choices,solve problems,plan and adjust to changing mental demands,"a senior investigator of Mindlab International explains. "While many schools are cutting music programs and spending more and more time on test preparation,our findings suggest that musical training may actually help to set up children for a better academic future."added D r.David Lewis. Question: What is the author's attitude towards school music programs? - Respectful. - Doubtful. - Tolerant. - Supportive.
Ans: Supportive.

Read the following article and select the best answer. Article: Have you ever felt annoyed when left talking to yourself after your mobile phone battery runs out in the middle of a call? If yes, then here comes some good news. Scientists are now perfecting a way to recharge electrical equipment while on the move. Researchers from theprefix = st1 /Netherlands,FranceandPortugalannounced last week that they have developed very thin solar panels that can be put on clothes. They can also be added to furniture and rooftops. They change light from the sun into electricity. In about three years, you'll be able to wear a jacket that will recharge your phone as you walk. For camping fans, the development could lead to a tent which charges batteries all day so you can have light or music at night. The basic technology of wearable solar panels is the same as that used for traditional solar panels. Pairs of sheets of semi-conducting silicon are linked together to form the panel. But scientists made them much thinner by using different silicon. At one micrometre, they are of the same thickness as photographic film. "This technology will make it easier for people to use clean energy sources," said a physicist in theNetherlandswho led the team of scientists. But the thin panels are not as efficient as the thicker ones. While some solar panels now operate at an efficiency of about 20 per cent, the new flexible panels are only 7 per cent efficient. But the thinner panel is cheaper. An A4 sized panel put onto the back of a jacket cost less than US$13. It could charge a cellphone during a summer walk in the countryside. As long as you stay within range of the transmitting masts that relay a call to the networks, phones will never again run out of power. Question: The passage is written to _ . - advertise a new product - explain how a new product works - introduce a new product - comepare different ways to use solar energy
introduce a new product