Read the following article and answer the question. Article: Bright blue Citi Bikes are becoming a fine sight in the New Yorker street. New Yorkers are gradually getting used to more pedaling 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. However, Ben said the bike-share is good for bike sales at his shop. "People have used the bike-share and realized how great it is to bike in the city, then decide that they want something nicer for themselves," he noted. 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." Farrell's early concerns were repeated by Andrew Crooks, owner of NYC Velo, at 64 Second Ave. "It seemed like a great idea, but one that would be difficult to put into use:' Crooks said of Citi Bike. He said he worried about inexperienced riders' lack of awareness of biking rules and strong negative reaction from non-cyclists. However, he said, it's still too early to tell if his business has been impacted . 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. Question: What is the author's chief concern about the increasing use of Citi Bikes in New York? Answer:
OPTIONS:
- Whether local bike shops will suffer.
- How non-cyclists will respond to it.
- Whether local bike businesses will oppose it.
- How the safety of bike riders can be ensured.
Whether local bike shops will suffer.

Read the following article and answer the question. Article: Imagine putting some bacteria in the freezer and taking them out millions of years later to find that they are still alive. That would be similar to what happened recently, when scientists brought eight-million-year-old bacteria back to life -- simply by thawing them out. The ancient bacteria were found frozen in the world's oldest known tracts of ice, the glaciers of Antarctica. Professor Bidle and his colleagues found and revived two samples of bacteria from the glacial ice. The first was a hundred thousand years old, and the second was around eight million years old. The eight-million-year-old bacteria were alive. But their genes were seriously damaged from long exposure to cosmic ( ) radiation, which is higher at the earth's poles. Most of the bacteria in the samples probably blew over from African deserts, said Paul Falkowski, a scientist at prefix = st1 /RutgersUniversity. Once the bacteria landed on the glacier's snowy surface, they combined with the snow to form ice. "These ices are actually gene banks," he added. As glaciers and ice caps melt as a result of increasing global warming, large amounts of bacterial genetic material might be washed into the ocean. These bacteria might get incorporated into today's bacteria in the ocean, or living bacteria from the ice might also grow and have an important effect on the ecosystem. "How that's going to play out, we don't know," Bidle said. He and Falkowski plan to focus their future work on how current ice melting influences modem bacteria's genetic diversity. Question: Professor Bidle and Paul Falkowski will probably do research into the influences of _ . Answer:
OPTIONS:
- global warming
- bacteria's genetic diversity
- glacier melting
- biological diversity

Answer: glacier melting

Read the following article and answer the question. Article: Human beings have a natural desire to explore the unknown. People with a strong interest in space like to say it is the last place left to explore. But scientists are warning that space exploration for long periods is not going to be easy. They say the human body is not designed to stay in space over an extended period. The New York Times recently published a report about scientists who are preparing astronauts for a trip to the Moon. The newspaper said the scientists want to make sure that their crews return home in good health. But there are many problems to be solved before people are ready for long trips to the Moon, an asteroid or even the planet Mars. Humans developed on a planet with a surface that is more than 70 percent water. Our bodies are also about 70 percent water. When there is no gravity that water moves up toward the head, raising pressure in the skull. Arms and legs grow weaker at what is called zero gravity because they no longer need to push against the force of gravity. Five years ago, astronauts who spent weeks in space reported a change in their eyesight. These astronauts were members of the crew on the International Space Station. Research showed a change in the shape of their eyes. Normally-round eyeballs had become flat during time in space. The research also showed that the right eye was affected more than the left, and that men were more affected than women. Scientists could not find an explanation for the differences. Bone loss was one of the problems first reported by astronauts returning to Earth after longer stays in space. So scientists designed exercise machines to use on the space station. Tests showed that the exercise equipment helped space travelers keep their bones almost as strong as when they left Earth. There are other health issues for astronauts who spend a long time in space. They may have problems eating and sleeping. But the biggest health issue is exposure to radiation. On Earth, human beings are protected by the atmosphere and the planet's magnetic field. In... Question: The following are problems mentioned in the passage Except _ . Answer:
OPTIONS:
- bone loss
- loss of water
- eyesight
- exposure to radiation
loss of water