Ladies and gentlemen, due to an unexpected accident, one of the singers who all of you to hear____tonight,

A. had come; don't perform

B. come; won't perform

C. have come; won't be performing

D. came; wouldn't perform

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科目：高中英語(yǔ) 來(lái)源：2014-2015學(xué)年遼寧省高三12月月考英語(yǔ)試卷（解析版） 題型：閱讀理解

D

Losing weight comes with a lot of health benefits—including making your brain sharper.

There have been few studies of overweight and cognitive functioning, (認(rèn)知功能) possibly because it is generally believed that it is not a primary risk cause for poor cognitive performance. Yet, it turns out that overweight may damage cognitive functions such as memory and attention. Losing weight, therefore, may help improve these mental functions, according to a new research led by John Gunstad, assistant professor of psychology at Kent State University.

Growing evidence suggests that being fat is linked to cognitive deficits (缺陷). So Gunstad and his team guessed that losing weight might improve mental function. For their study, they measured memory and attention in a group of 150 overweight participants, some of whom had some kind of operation for weight loss and some did not. All of the volunteers completed mental skills tests to assess their abilities of memory and attention at the beginning of the study, and again 12 weeks later. To begin with, about 24% of the patients showed damaged learning and 23% showed signs of poor memory when tested. At the end of the study, those who had lost weight after operation improved their scores into the average or above average range for cognitive functions. Scores for the volunteers who didn’t lose weight dropped even further.

The study helped Gunstad to find out whether losing weight had any effect on mental function. Now that he’s seen the positive effect that weight loss can have on memory and attention, he says he will next study those who choose to lose weight by the traditional way—eating healthier and getting more active. He expects that losing weight in this way will have a similarly positive effect on the brain. “If we can improve the condition with operations, then we can probably produce the same change with behavioral weight loss as well,” he says.

1.There is less research on overweight and cognitive functions because researchers _____.

A. believe overweight only affects our body

B. have focused on ways to sharpen people’s mind

C. do not consider overweight a main cause for low cognitive ability

D. are clear about the relation between weight and mental functions

2.The result of Gunstad’s study shows that ______.

A. losing weight has little effect on people’s memory

B. losing weight can improve people’s mental functions

C. overweight people are likely to have psychology problems

D. overweight people’s abilities of concentration differ greatly

3.What is Gunstad planning to prove next in his research?

A. Slim people are smarter than overweight people.

B. Healthy diet is better than exercise in losing weight.

C. Traditional ways of losing weight are better than operation.

D. Overweight people will get smarter by taking more exercise.

4.Which of the following is the best title for the text?

A. Body Weight and Health

B. Losing Weight by Operation

C. Ways to Improve Mental Functions

D. Losing Weight to Sharpen Your Mind

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---- Mary, I’m going to Paris for a couple of days?

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Bright blue Citi Bikes are becoming a fine sight in the New Yorker street. New Yorkers are gradually getting used to more pedaling（騎車(chē)的) passengers on those blue Citi Bikes. But what about local bike shops ? Is City Bike booming at their expense? At Gotham Bikes in Tribeca, a manager who gave his name as "Ben W." said the shop has seen an increase in its overall sales due to the bike-share program. "It's getting more people on the road, more people learning about the sport and getting involved," he said. An employee at Danny's Cycles in Gramercy said Citi Bike is a good option for people in a city famed for its traffic jams and aggressive drivers. "They can try out a bike without buying one:' James Ryan said.

Rentals are not a big part of the business at either Gotham Bikes or Danny's Cycles. But for Frank's Bike Shop, a small business on Grand St., the bike-share program has been bad news. Owner Frank Arroyo said that his rental business has decreased by 90% since Citi Bike was launched last month. Arroyo's main rental customers are European tourists, who have since been drawn away by Citi Bikes.

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Christian Farrell of Waterfront Bicycle Shop, on West St. said at first he was concerned about bike-share, though, he admitted, "I was happy to see people on bikes."

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While it's possible bike-share will cause a drop in business, Crooks agreed that the idea is a positive step forward for New York City.

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A. Whether local bike shops will suffer.

B. How non-cyclists will respond to it.

C. Whether local bike businesses will oppose it.

D. How the safety of bike riders can be ensured.

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C. It saw its bike sales on the rise.

D. It rented more bikes to tourists.

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A. Its customers have been drawn away by Citi Bikes.

B. It cannot meet the demand of the bike-share program.

C. Its bike prices have to be lowered again and again.

D. It has to compete with the city's bike rental shops.

4.What is the general attitude of the local bike shops towards Citi Bike?

A. Doubtful. B. Negative.

C. Uninterested. D. Approving.

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He says difficulty you meet with in your work, you can turn to him for help

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