Punishing people for using hand-held gadgets while driving is difficult enough, even though they can be seen from outside the car. Persuading people to switch their phones off altogether when they get behind the wheel might be the only answer. Who knows, they might even come to enjoy not having to take calls.

47. Carrying on a mobile phone conversation while one is driving is considered dangerous because it seriously distracts .

48. In the experiments, the two groups of volunteers were asked to handle a series of moving tasks which were considered .

49. Results of the experiments show that those who were making the equivalent of a hands-free call took to react than those who were not.

50. Further experiments reveal that participants tend to respond with extra delay if they are required to do .

51. The author believes persuasion, rather than , might be the only way to stop people from using mobile phones while driving.

Section B

Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.

Passage One

Questions 52 to 56 are based on the following passage.

There is nothing like the suggestion of a cancer risk to scare a parent, especially one of the over-educated, eco-conscious type. So you can imagine the reaction when a recent USA Today investigation of air quality around the nation’s schools singled out those in the smugly（自鸣得意的）green village of Berkeley, Calif., as being among the worst in the country. The city’s public high school, as well as a number of daycare centers, preschools, elementary and middle schools, fell in the lowest 10%. Industrial pollution in our town had supposedly turned students into living science experiments breathing in a laboratory’s worth of heavy metals like manganese, chromium and nickel each day. This in a city that requires school cafeterias to serve organic meals. Great, I thought, organic lunch, toxic campus.

Since December, when the report came out, the mayor, neighborhood activists（活跃分子）and various parent-teacher associations have engaged in a fierce battle over its validity: over the guilt of the steel-casting factory on the western edge of town, over union jobs versus children’s health and over what, if anything, ought to be done. With all sides presenting their own experts armed with conflicting scientific studies, whom should parents believe? Is there truly a threat here, we asked one another as we dropped off our kids, and if so, how great is it? And how does it compare with the other, seemingly perpetual health scares we confront, like panic over lead in synthetic athletic fields? Rather than just another weird episode in the town that brought you protesting environmentalists, this latest drama is a trial for how today’s parents perceive risk, how we try to keep our kids safe—whether it’s possible to keep them safe—in what feels like an increasingly threatening world. It raises the question of what, in our time, “safe” could even mean.

“There’s no way around the uncertainty,” says Kimberly Thompson, president of Kid Risk, a nonprofit group that studies children’s health. “That means your choices can matter, but it also means you aren’t going to know if they do.” A 2004 report in the journal Pediatrics explained that nervous parents have more to fear from fire, car accidents and drowning than from toxic chemical exposure. To which I say: Well, obviously. But such concrete hazards are beside the point. It’s the dangers parents can’t—and may never—quantify that occur all of sudden. That’s why I’ve rid my cupboard of microwave food packed in bags coated with a potential cancer-causing substance, but although I’ve lived blocks from a major fault line(地质断层) for more than 12 years, I still haven’t bolted our bookcases to the living room wall.

52. What does a recent investigation by USA Today reveal?

A) Heavy metals in lab tests threaten children’s health in Berkeley.

B) Berkeley residents are quite contented with their surroundings.

C) The air quality around Berkeley’s school campuses is poor.

D) Parents in Berkeley are over-sensitive to cancer risks their kids face.

53. What response did USA Today’s report draw?

A) A heated debate.

B) Popular support.

C) Widespread panic.

D) Strong criticism.

54. How did parents feel in the face of the experts’ studies?

A) They felt very much relieved.

B) They were frightened by the evidence.

C) They didn’t know who to believe.

D) They weren’t convinced of the results.

55. What is the view of the 2004 report in the journal Pediatrics?

A) It is important to quantify various concrete hazards.

B) Daily accidents pose a more serious threat to children.

C) Parents should be aware of children’s health hazards.

D) Attention should be paid to toxic chemical exposure.

56. Of the dangers in everyday life, the author thinks that people have most to fear from __________.

A) the uncertain

B) the quantifiable

C) an earthquake

D) unhealthy food

Passage Two

Questions 57 to 61 are based on the following passage.

Crippling health care bills, long emergency-room waits and the inability to find a primary care physician just scratch the surface of the problems that patients face daily.