Read the following article and select the best answer. Article: New research shows that kids from low-income families may be falling behind their peers because an important part of their brains is underdeveloped. Researchers from MIT' s McGovern Institute for Brain Research compared the brains of 12-and 13-year-olds from rich families with the brains of their peers from lower-income families. They found that one particular area of the brain--the neocortex ,which plays a key role in memory and learning ability--is thinner in children from lower-income households. This is a _ part of the brain for young students, who are often tested based on their ability to recall large chunks of information. Children who had a thinner neocortex performed poorly on standardized tests,researchers found.More than 90% of high-income students scored above average on a statewide math and English/Language Arts standardized test,compared with less than 60% of low-income students.Differences in cortical thickness could account for almost half of the income-achievement gap in this sample,researchers wrote. "Just as you would expect, there' s a real cost not living in a supportive environment. We can see it not only in test scores,in educational attainment,but within the brains of these children,"says psychological scientist John Gabrieli,a professor of brain and cognitive sciences at MIT and one of the study's authors. Since a 2011 study published by Stanford University professor Sean Reardon found that the gap between standardized test scores of high-income and low-income students has grown by about 40% since the 1960s,there' s been a lot of research aimed at finding links between income and achievement, rather than race alone. The MIT study found low-income children were equally likely to have a thinner neocortex,no matter their races. Gabrieli and his co-authors can' t say exactly why poor children' s brains develop differently because there are too many possibilities to count.Their findings do,however,underline the importance of early intervention to ensure that low-income kids get the tools... Question: What is the main idea of the passage? - Wealthy parents do better in raising children. - Differences exist between poor children and rich ones. - Poor children study harder due to their financial conditions. - Poor children have thinner neocortex than their wealthy peers.
Poor children have thinner neocortex than their wealthy peers.

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Read the following article and select the best answer. Article: In the near future, all housework will be done without having a robot maid. Smart home technology will allow all sorts of electronics and appliances to be able to communicate with each other and perform various tasks. Whenever someone wants to have a snack, but does not feel like making something, why not have the refrigerator suggest something based on what it has inside of it. Not only that, it would communicate with the microwave to prepare the cooking power and time for that particular dish. Nearly all major appliances in the future will take advantage of this technology through home networks and the Internet. Smart home technology is a way for ordinary electronics and appliances to communicate with each other, consumers, and even manufacturers. Many consider a smart home to be one that is networked. Others feel it is a home that has appliances that will allow the consumer to do little or no work, but a smart home really is all of that combined, and more. Not only will all consumer products be networked, but they will also make life easier and more entertaining. Smart home technology is currently being developed and carried out for all rooms in the house, in particular the kitchen and the living room. Many of today's products are becoming "smart." Kitchen refrigerators, microwaves, and stoves are using this technology. Even washers and dryers have the technology today to be more automated to fit people's needs. Products in the bathroom will even start to use smart home technology. Electric razors, toilets, and showers will have some sort of automation built in. Smart home technology is still in its early stages but will soon make a great effect on everyone's lives. Question: In the near future, all housework will be done _ . - by a robot maid - by one major appliance in the house - with little or no human effort - in a shorter time
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with little or no human effort

Ques: Read the following article and select the best answer. Article: The penny is getting a change. The United States Mint revealed four new designs for the 1-cent piece, to celebrate the coming 200th anniversary of President Abraham Lincoln's birth. United States Mint Director Ed Moy announced the new looks for the penny today in front of the Lincoln Memorial in Washington, D.C. "These coins are a tribute to one of our greatest Presidents, whose legacy has had a lasting impact on our country," Moy said. The heads side of the new pennies will continue to bear the profile likeness of President Lincoln and the motto "In God We Trust." The back sides will pay tribute to four major parts of prefix = st1 /Lincoln's life. The first redesigned penny will feature a log cabin that represents Lincoln's birthplace, near Hodgenville,Kentucky. The second design showsLincolnreading a book while sitting on a log with his ax beside him. It shows how young Lincoln educated himself while working as a rail-splitter inIndiana. The third design shows Lincoln as a young man in front of the Capitol in Illinois. The fourth and final design shows a half-finished United States Capitol dome, which was completed in 1863 despite the violent Civil War. The writing, on the back sides of the coins will remain "United States of America," "E Pluribus Unum" and "One Cent." The first penny will be released into circulation on February 12, 2009, Lincoln's 200th birthday. This day is also the 100th anniversary of the release of the first penny, on February 12, 1909. One new coin will be released into circulation every three months in 2009. "This is an important occasion in the history of our nation's coin-age because these designs represent the first change in the Lincolncent in half a century," said Director Moy. A commemorative Lincoln silver dollar will also be released in 2009. Question: All the newly designed coins feature the following EXCEPT _ . - the profile likeness of President Lincoln - the motto "In God We Trust" - the portrait of young Abraham Lincoln - the writing "United States of America"
Ans: the portrait of young Abraham Lincoln

Read the following article and select the best answer. Article: Lichens are difficult to see. They don't move. They often mix into the living place. You might not even recognize one if you are looking right at it. Lichens live on rocks, branches, houses, and even metal street signs. You can find these colorful organisms almost everywhere -- from deserts to rainforests, and from Antarctica to Africa. They've traveled in outer space, and some scientists think there might even be lichens on Mars. What you probably don't realize is that a lichen is more than a single thing. It includes two different types of living organisms: a fungus and an alga . Neither of these organisms is a plant, so the lichen isn't a plant either. Through photosynthesis , the alga gets the sun's energy to make food for the fungus, which is the place for the alga to live in. However, the alga cannot leave the fungus. Around the world, scientists have found tens of thousands of types of lichens. Many may not even have been discovered yet. As scientists continue to find new kinds of lichens, they are also working to understand how they are connected to one another. By putting together a lichen family tree, they hope to understand why so many different types of lichens have grown in so many places around the world. Many researchers are trying to understand basic facts about the organisms and their connections. Researchers are also using lichens to examine the health of the environment. Question: Which of the following statements is NOT the scientists' purposes of studying lichens? - To understand basic facts about them. - To creat a lichen family tree. - To understand how lichens are related to each other. - To understand why lichens can live in different places.
To creat a lichen family tree.