Section A Directions: In this section, there is a short passage with 5 questions or incomplete statements. Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words. Please write your answers on Answer Sheet 2. Questions 47 t0 51 are based on the following passage. Last month 25 people died and 130 were injured in a train crash near Los Angeles. The cause was a cell phone. In three hours of work before the crash, one of the engineers received 28 text messages and sent 29 more. He sent his last message 22 seconds before impact, just after passing a signal that would have alerted him to the disaster ahead. Scientists call this phenomenon "inattention blindness". The mind, captured by the world inside the phone, becomes blind to the world outside it. Millions of people move among us in this half-absent state. Mentally, they&39;re living in another world. In many ways, mobile phones are wonderful. Through the phone, you can escape the confines of your environment. The problem is that physically, you&39;re still living in that environment. Like other creatures, you&39;ve evolved to function in the natural world one setting at a time. Nature has never tested a species&39; ability to function in two worlds at once. So how is tbis multitasking experiment going? Not so well. In the nationwide survey, 45 percent of Americans said they&39;ve been hit or nearly hit by a driver on a cell phone. Studies show that the more tasks you dump on drivers, the worse they perform. Our performance on the two-worlds test, like all evolutionary experiments, can be measured in death. The Federal Railroad Administration reports seven cell-phone-related railway accidents in the last three years, five of them fatal.. Today, we&39;re so enslaved to mobile devices that we rely on them even to translate the physical world. Misled by with Global Positioning System devices, people are driving cars into rivers, trees, and sand piles. Twice this year in Bedford Hills, N.Y., drivers have caused train crashes by steering onto the track because their GPS mistook it for a road. Waming signs, pavement markings, and reflective train-signal masts failed to stop them. They trusted the dashboard (仪表盘 ), not the windshield. If we don&39;t want this two-worlds experiment to be regulated nature&39;s way, then we&39;d better regulate it ourselves. Here are a few proposed rules of the road. Multitasking is a glonous gift. We can&39;t ban it, nor should we. Want to phone your spouse or your office while walking? Fine. The only life at stake is yours. Want to tum on your car radio or music playeP. Fine. Listening is easier than talking, and you can mentally or physically shut it off when necessary. Want to chat with your passenger? Fine again. Studies indicate that passenger conversations are less distracting than phone calls, apparently because you&39;re sharing the same environment. The train crash happened near Los Angeles last month was caused by_____________. When a person uses a cell phone when driving, he is performing in both____________worlds. Studies show that the more tasks you do while driving, _____________. By saying the example of GPS, the author wants to indicate that people now are very_____________. According to the studies, why talking with your passengers is safer than phone calls while driving?