Read the article and select the best answer. Article: Smart Exercise Doctors are starting to find more and more information that suggests a connection between exercise and brain development. Judy Cameron, a scientist at Oregon Health and prefix = st1 /ScienceUniversity, studies brain development. According to her research, it seems that exercise can make blood vessels, including those in the brain, stronger and more fully developed. Dr. Cameron claims this allows people who exercise to concentrate better. As she says: "While we already know that exercise is good for the heart, exercise can literally cause physical changes in the brain." The effects of exercise on brain development can even be seen in babies. Babies who do activities that require a lot of movement and physical activity show greater brain development than babies who are less physically active. With babies, even a little movement can show big results. Margaret Barnes, a pediatrician , believes in the importance of exercise. She thinks that many learning disabilities that children have in elementary school or high school can be traced back to a lack of movement as babies. "Babies need movement that stimulates their five senses. They need to establish a connection between motion and memory. In this way, as they get older, children will begin to associate physical activity with higher learning," says Margaret. Older people can beef uptheir brains as well.CornellUniversitystudied a group of seniors ranging in age from seventy to seventy-nine. Their study showed a short-term memory increase of up to 40 percent after exercising just three hours a week. The exercise does not have to be very difficult, but it does have to increase the heart rate. Also, just like the motion for infants, exercise for older people should involve some complexity. Learning some new skills or motions helps to open up memory paths in the brain that may not have been used for a long time. For most people, any type of physical activity that increases the heart rate is helpful. The main goal is to increase the brain's flow of... Question: The title of the passage implies that Options: A: only smart people do exercise. B: exercise can be smart or stupid. C: exercise keeps the brain strong. D: it is fashionable to do exercise.
C

Read the article and select the best answer. Article: The vast jungles of the Amazon rainforest are home to tribes mostly isolated from the outside world, whose way of life, largely unchanged for hundreds of years, is now increasingly threatened by modern civilization. Now, scientists discover they can monitor these "uncontacted tribes" using satellites, which would allow inexpensive and safe tracking of these tribes in order to protect them from outside threats. In order to help preserve these uncontacted Indians, researchers need accurate estimates of their populations. One way to collect this data involves flying over their villages, but such over-flights are both expensive and could fill these native peoples with fear. Another strategy involves meeting individuals on the ground, but among other risks, scientists could accidentally spread disease to members of the tribes. Instead, scientists investigated whether satellite images could monitor uncontacted tribes. The result was inspiring. They confirmed their locations and measured the sizes of their village, houses and gardens. "We can find isolated villages with remote sensing and study them over time." Walker told Live Science. "We can ask: Are they growing? Do they move?" Surprisingly, based on the sizes of the houses and villages, the scientists find the population densities of these isolated villages are about 10 times greater, on average, than other villages of native Brazilian peoples. This may be due to the fact that they have to live closer together because they are not as good at clearing the forest, since they lack modern devices like chainsaws and tractors, the researchers said. The tribes may also be afraid of spreading out due to fear of being attacked by outsiders, Walker said. The researchers now plan to focus on 29 more isolated villages to "look at their ecology-- that is, distance from rivers and roads--and use this to model where else we can find more isolated villages," Walker said. Question: According to the passage, which of the following about the Indian tribes is NOT true? Options: A: They lack modern tools to cut forests. B: Their life styles remain unchanged. C: They live closer together for defense. D: They are contacting the outside world.
D

Read the article and select the best answer. Article: Paris Passengers carried per day: 4.4m Cost of ticket: 80p flat fare Length: 131 miles Lines: 14 Stations: 297 In Paris there are pleasures for those who use the Metro -- many of them artistic. The graceful Art Nouveau dragon-fly entrances are just the most noticeable on a Metro system which celebrated its 100thanniversary by spending 30 million francs (PS2.9million) on making its stations works of art. On my way home I pass Bonne Nouvelle station in the heart of Paris's cinema district. There, during the cinema festival this summer, special lighting effects dot the platforms and films are projected onto the large advertising boards. More than anything the metro is efficient. "When I worked on line 4", says a retired driver, "we had exactly 30 minutes and 15 seconds to complete the journey. If it took any longer, they cut our pay." But there are problems. Many Metro stations have too many stairs, and changing lines at big interchanges can be tiresome. Moscow Passengers carried per day: 9m Cost of ticket: 12p Length: 164 miles Lines: 11 Stations: 162 The first underground passage for the Moscow Metropolitan started in 1932. Three years later the trains started running. They haven't stopped since-- every 90 seconds or two minutes during rush hour, every five minutes the rest of the time, from 6 a.m. till 1 a. m. There may be a crowd of people but there is seldom a wait. The trains take you through spacious and spotless stations. For tourists it's a major sightseeing attraction: from Russian Art Deco to neo-classical, the Metro stations are not to be missed. Tokyo Passengers carried per day: 7m Cost of ticket: 90p ~ PS1.68 Length: 177 miles Lines: 12 Stations: 209 Trains do not just arrive on time in Tokyo. They stop right on the platform mark so that passengers can line up knowing exactly where the doors will open. Train driving is a respectful job for life, for which the applicants must pass a strict screening of health checks, interviews and written exams before they can put on the enviable... Question: In which two cities can travelling by underground be a sightseeing experience? Options: A: Moscow and Tokyo B: Paris and Moscow C: Paris and Mexico City D: Tokyo and Mexico City
B