Read the article and select the best answer. Article: Global Positioning Systems (GPS) are now a part of everyday driving in many counties.These satellite-based systems provide turn-by-turn directions to help people get to where they want to go. But, they can also cause a lot of problems, send you to the wrong place or leave you completely lost. Many times, the driver is to blame. Sometimes a GPS error is responsible. Most often, says Barry Brown, it is a combination of the two. Barry Brown is with the Mobile Life Centre in Stockholm, Sweden. The center studies human-computer interaction, or HCI, especially communications involving wireless devices. He told us about an incident involving a friend who had flown to an airport in the eastern United States. There he borrowed a GPS-equipped car to use during his stay. "And they just plugged in an address and then set off to their destination. And, then it wasn't until they were driving for thirty minutes until they realized they actually put in a destination back on the West Coast where they lived. They actually put their home address in. So again, the GPS is kind of 'garbage in garbage out'." Mr. Brown says this is a common human error. But, he says, what makes the problem worse has to do with some of the shortcomings, or failures, of GPS equipment. "One problem with a lot of the GPS units is they have a very small screen and they just tell you the next turn. Because they just give you the next turn, sometimes that means that it is not really giving you the overview that you would need to know that it's going to the wrong place." Question: The Mobile Life Centre in Sweden foruses on the research into _ . Options: A: computer-computer interaction B: human-computer interaction C: satellite-satellite system D: human-satellite system
B

Read the article and select the best answer. Article: Many of us believe that a person's mind becomes less active as he grows older.But this is not true,according to Dr.Lissy F.Jarvik,professor of psychiatry at the University of California,Los Angeles,and a board member of the New Center for Aging at the Veterans Hospital.She has studied the mental functioning of aging persons for several years.For example,one of her studies concerns 136 pairs of twins, who were first examined when they were already 60 years old.As Dr.Jarvik continued the study of the twins into their 70s and 80s,their minds did not generally decline as was expected. However,there was some decline in their psycho-motor speed. This means that it took them longer to accomplish mental tasks than it used to.But when speed was not a factor,they lost very little intellectual ability over the years.In general,Dr.Jarvik's studies have shown that there is no decline in knowledge or reasoning ability.This is true not only into the 30s and 40s,but into the 60s and 70s as well. As for learning new things,and ability to remember,studies by Dr.Jarvik and others show that the old are equal to the young.It is true that older people themselves often complain that their memory is not as good as it once was.However,much of what we call"loss of memory"is not that at a11. In the cases where the older person's mind really seems to decline,it is not necessarilv a sign of a decay due to becoming old or"senility".Often it is simply a sign of a depressed emotional state.This depression usually can be got rid of by counseling with a psychologist,or medicine which fights depression. In American society,when an older person loses something,we tend to call him or her"senile".But notice that when a younger person loses something,he does not blame it on senility or loss of memory.He finds some other excuse! Question: A long-term study of 136 pairs of twins showed that the only factor that declined over the years was . Options: A: mental health B: intellectual ability C: the amount of knowledge D: psycho-motor speed
D

Q: Read the article and select the best answer. Article: Americans won't live without cars! Each year there is an increasing number of cars on roads and streets, as millions of new cars are produced. One out of every six Americans work at putting together the parts of cars, driving trucks, building roads or filling cars with gas. Most Americans find it hard to think what life would be without a car. However, some have realized the serious problem of air pollution by cars. The polluted air is poisonous and dangerous to health. One way to get rid of the polluted air is to design a new car that does not pollute. That's what several large car factories are trying to do. But to build the new car is easier said than done. Progress in this field has been slow. Another way is to take place of the car engine by something else. Engineers are now working on some new cars. Many makers believe that it will take years to develop a practical model that pleases man. To prevent the world from being polluted by cars, we'll have to make some changes in the way many of us live. Americans, for example, have to cut down the number of their cars they are encouraged to travel and go to work by bike. Riding a bike is thought to help keep the air clean. But this change does not come easily, a large number of workers may find themselves with no jobs if a car factory closes down. And the problem of air pollution would become less important than that of unemployment. Question: Large car factories are trying to build a clean car, _ Options: A: which is clean itself B: which does not pollute the air C: which is used to clean streets D: which is easier to make
A: B

(Question)
Read the article and select the best answer. Article: American government suggests that children and teens should get 60 minutes of physical activity every day. But less than half of children and just 10% of teens meet these suggestions. What's the deal? It's reported that about 44million US kids participate in organized sports(such as baseball, softball, soccer).But a new study says just one-quarter of kids get the government-recommended amount of exercise when they show up for team practices. The study, published online last month in a medical journal, says younger kids and boys do better than teens and girls. The study looked at 200 kids aged 7 to 14 who played on soccer, baseball and softball teams. The kids wore sensors to measure their activity during practices. During each practice, kids averaged 30 minutes of downtime . "It is not clear how much physical activity is provided by youth sports practices," say the California-based authors of the study. "Much of the time may be inactive, such as receiving verbal instructions and waiting for turns." What's a parent or coach--or kid--to do? The authors of the study suggest increasing the number of practices, _ the time of practices and changing it up during practices. For example, the coach could give each player a ball at the same time. Rather than focusing on one player's skills, it's best to get the whole team moving. But, the study says, the bottom line is that team sports aren't enough exercise. For a child to meet the US physical activity suggestions, the kid will have to do more than just join a team. Exercise is also necessary during breaks, during physical education class, after school and even on the way to school. Question: The passage is probably written for _ . Options: A: physical teachers and parents B: doctors and nurses C: class advisers and researchers D: kids and headmasters
(Answer)
A