Article: Mass transportation revised the social and economic fabric of the American city in three fundamental ways.It catalyzed physical expansion, it sorted out people and land uses, and it accelerated the inherent instability of urban life.By opening vast areas of unoccupied land for residential expansion, the omnibuses, horse railways, commuter trains, and electric trolleys pulled settled regions outward two to four times more distant form city centers than they were in the premodern era.In 1850, for example, the borders of Boston lay scarcely two miles from the old business district; by the turn of the century the radius extended ten miles.Now those who could afford it could live far removed from the old city center and still commute there for work, shopping, and entertainment.The new accessibility of land around the periphery of almost every major city sparked an explosion of real estate development and fueled what we now know as urban sprawl.Between 1890 and 1920, for example, some 250,000 new residential lots were recorded within the borders of Chicago, most of them located in outlying areas.Over the same period, another 550,000 were plotted outside the city limits but within the metropolitan area.Anxious to take advantage of the possibilities of commuting, real estate developers added 800,000 potential building sites to the Chicago region in just thirty years - lots that could have housed five to six million people. Of course, many were never occupied; there was always a huge surplus of subdivided, but vacant, land around Chicago and other cities.These excesses underscore a feature of residential expansion related to the growth of mass transportation: urban sprawl was essentially unplanned.It was carried out by thousands of small investors who paid little heed to coordinated land use or to future land users.Those who purchased and prepared land for residential purposes, particularly land near or outside city borders where transit lines and middle-class inhabitants were anticipated, did so to create demand... Question: According to the passage, what was one disadvantage of residential expansion? Yes or no, is the answer "It was unplanned."?
Yes

Article: WASHINGTON(Reuters)-People who drink two or more sweetened soft drinks a week have a much higher risk of pancreatic cancer , an unusual but deadly cancer, researchers reported on Monday. People who drank mostly fruit juice instead of sodas did not have the same risk, the study of 60,000 people in Singapore found. "Sugar may be to blame but people who drink sweetened sodas regularly often have other poor health habits," said Mark Pereira of the University of Minnesota, who led the study. "The high levels of sugar in soft drinks may be increasing the level of insulin in the body, which we think contributes to pancreatic cancer cell growth," President said in a statement. Writing in the journal Cancer Epidemiology, Biomarkers & Prevention, Pereira and his colleagues said they followed 60,524 men and women in the Singapore--Chinese Health Study for 14 years. Over that time, 140 of the volunteers developed pancreatic cancer. Those who drank two or more sweetened soft drinks a week had an 87 percent higher risk of being among those who got pancreatic cancer. Pereira said he believed the findings would apply elsewhere. "Singapore is a wealthy country with excellent healthcare. Favorite pastimes are eating and shopping, so the findings should apply to other western countries." he said. But Susan Mayne of the Yale Cancer Center at Yale University in Connecticut was cautious. "Although this study found a risk, the finding was based on a relatively small number of cases and it remains unclear whether it was a causal connection or not." Said Mayne, who serves on thee board of the journal, which is published by the American Association for Cancer Research. Pancreatic cancer is one of the deadliest form of cancer, with 230,000 cases globally. In the United States, 37,680 people are diagnosed with pancreatic cancer in a year and 34, 290 die of it. Question: We can infer from Pereira's word that _ Yes or no, is the answer "sugar might not be the only cause of pancreatic cancer."?
Yes

Q: Article: Zhu Haoyu, 18, a history major, wears his iPod everywhere on campus. The freshman has it going out for a walk, visiting the library or lying in bed. However, he found that his habit is like displaying a big "Do not disturb "sign for himself. As time slips away, he has begun to regret not having conversed much with his peers around . "As I put the little buds into my ears, I'm in a universe of my own, forgetting all troubles in the real world," said Li. The MP3 player is one of a number of gadgets --starting with the Sony Walkman, which led to the iPod, iPhone and iPad --that give people the ability to shut themselves off from world around them. Youngsters delight in handset technology. In public, students chat on their cell phones, stopping only to talk briefly to friends. On buses or trains it's common to see youngsters with PlayStations instead of playing poker or sharing jokes or games. And during airline flights, people watch episodes of US TV dramas on their iPads, rather than talking. The recently published an article saying that headphone wearing culture is making us anti-social. "Half of humankind is wired to a parallel universe that leaves them ignoring their surroundings and fellows," wrote Tom de Castella. Actually, it's a decade since Apple unveiled the iPod, which promised "1,000 songs in your pocket". In 2007 more than half of Western residents were using an iPod or MP3 player. Entertainment is on offer in all surroundings, not just at home. But in the meantime, it has created barriers between us. Many people subscribe to the view that the headphone culture is creating a "spoilt, selfish generation that lacks civic culture". However, many users of portable MP3 players argue that the device, as a mind drug, helps them relieve stress by escaping for a while. It is also said to be able to help some students concentrate on work or study. "If you want to get away from the hucksters on the way, just start listening to your player," said Liu, a freshman. "They do not approach people with... Question: What is the writer's attitude towards the headphone culture ? Yes or no, is the answer "Critical."?
A: No

(Q).
Article: One night in February 1962, John H. Glenn. Jr., flew over Australia. The man in the Mercury capsule was alone, but friendly voices reached him by radio. On the dark land 100 miles below, he saw a sprinkling of light. They marked the city of Perth, where people had turned on their lights as a greeting to him. In Friendship7, Glenn radioed, " The lights show up very well. Thank for everybody for turning them on." His capsule raced on to the east. During his three orbits(......) of the earth, Glenn could always reach one of eighteen tracking stations. Some of them were on ship at sea. Others were in the United States. Many of the stations had been built with the help of other countries. These countries allowed Americans to bring in radio equipment and set it up. Without the help of such lands as Nigeria , Zanzibar(,), and Mexico, there would have been breaks in the worldwide radio network. John H. Glenn. Jr., was the first America to orbit the earth. For his flight, the tracking network covered 60,000 route miles. Five hundred men worked in the stations along the route. Since his flight, the network has grown. Today, it covers more than 100,000 route miles and has about one hundred stations. One-third of these stations are outside of the United States. Question: From the passage we can see that _ . Yes or no, is the answer "radio equipment is important in space flight"?
(A).
No