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." The passage is mainly about GPS  _  . A) benefit B) shortcoming C) function D) appearance
B

At railway stations all across Britain next week, groups of students will gather with their backpacks to wait for the trains that will carry them home for Christmas. This is as large a movement of human beings as before, but with more contradictory traffic flows, so that trains filled with the young pass each other travelling in every direction. At first, I went home every weekend with my washing, but then those visits became less regular. How did I let my parents know I was coming? They had no phone. Perhaps I wrote to them ("Expect me with dirty shirts this Friday afternoon"), but more likely I didn't let them know, and just turned up or didn't turn up, not understanding that my parents' dashed hopes of seeing me were a greater casualty of my carelessness than a spoiled tea. And in all this I suspect I was typical, at least of young men. As for our fathers and mothers, none of them talked of "empty-nest syndrome", even though its implication that the principal human duty is to protect and feed the young would have suited their generation better than ours. Then, the feelings of loss went without a name. Today, it's a condition with _ , which will make parents feel more enjoyable in their life. The Mayo Clinic, for example, suggests you try to maintain regular contact with your children through "visits, phone calls, emails, texts or video chats". If you feel depressed, lean on loved ones or your mental health provider. Above all, stay positive: "Thinking about the extra time and energy you might have to devote to your marriage or personal interests after your last child leaves home might help you adapt to this major life change." What can't be denied, however, is that children often leave home. In modern societies, this is what they do. Christmas is the very time they can be depended on to return. For the non-religious, that may be this season's true comfort and significance. From the passage we can infer that by writing the article the writer's purpose is to  _  . A) persuade the young to show concern for their parents B) ask the young to go home regularly C) make the young understand their parents' interests D) enable the young to be more independent
A

One day, my friend Jimmy told me a story. Farmer Joe was in his cart when he was hit by a truck. He decided his injuries from the accident were serious enough to take the trucking company (which caused the accident)to court. In court the trucking company's lawyer was questioning Farmer Joe. "Didn't you say, at the same scene of the accident, 'I'm fine'?" said the lawyer. Farmer Joe responded, "Well, I will tell you what happened. I had just loaded my favorite mule Bessie into the..." "I didn't ask for any details," the lawyer interrupted, "Just answer the question.Did you not say, at the scene of the accident, 'I'm fine? ' " Farmer Joe said, "Well, I had just got Bessie into the cart and I was driving down the road..." The lawyer interrupted again and said, "Judge, I am trying to make clear the fact that, at the scene of the accident, this man told the police on the scene that he was just fine. Now several weeks after the accident he is trying to cover the fact. I believe he is telling lies. Please tell him to simply answer the question." By this time the Judge was fairly interested in Farmer Joe's answer and said to the lawyer, "I'd like to hear what he has to say about his favorite mule Bessie." Joe thanked the Judge and went on, "Well, as I was saying, I had just loaded Bessie, my favorite mule, into the cart and was driving her down the road when this huge truck ran into the stop sign and pushed my cart right in the side. I was thrown into one side and Bessie was thrown into the other." "I was hurt so badly that I didn't want to move. However, I could hear old Bessie breathing loudly and groaning  . I knew she was in great pain. Shortly after the accident a traffic policeman came to the scene. He could hear Bessie groaning so he went over to her. After he looked at her, he took out his gun and shot her between the eyes. Then the patrolman came across the road with his gun and looked at me. He said, "Your mule was in such pain that I had to shoot her. How are you feeling?" Farmer Joe  _  . A) did say "I'm fine." at the scene of the accident B) couldn't have said "I'm fine." at the scene of the accident C) could not remember whether he had said "I'm fine." at the scene of the accident D) tried to cover the fact in the court but no one would believe him

A