Article: Several years ago, the mayor of Chicago, Illinois, visited Germany, a leader in green roof design. Later he decided to have vegetation planted on Chicago City Hall. Today, the tops of many other buildings also look like parks. In Canada, the Coast Plaza Hotel in Vancouver has a forest on its roof. New York City has an unusual example farm for hydroponics. The farm is on a boat called the Science Barge. Rainwater and river water are used to grow lettuce, tomatoes, cucumbers and peppers. The farm shows the possibilities for designing rooftop systems. Green roofs are designed to save energy and capture rainwater. Rooftops covered with plants help keep buildings cool. They can extend the life of a roof. And they can reduce water running off into streets and storming water systems. Experts say green roofs usually do not get much above 27degC. So temperatures might not be a problem for growing. But rooftop gardeners have to be careful not to put too much weight on the roof. This is true whether plants are grown in soil or water. Earlier in 2008, researchers in Texas reported that green roofs can reduce a building's air conditioning costs by about onefifth compared to blacktop roofs.  But they also reported that not all green roofs perform equally well. They found that designs differ in their ability to keep buildings cool and to capture rainwater. The researchers put experimental roofs on top of metal insulated   boxes, to recreate green roof conditions. The study compared products from six companies to help businesses understand how to improve their designs. Each rooftop had sixteen different kinds of plants native to Texas. The researchers say the presence of native plants likely helped all the green roofs capture water better compared to sedums. Sedums are plants that need little water and often are used on green roofs. The native plants could take in more water and release more of it to the atmosphere. Question: The advantages of green roofs are mentioned in the passage EXCEPT   _  . Yes or no, is the answer "changing the local weather"?
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Article: It takes more than just practice to become an Olympian. Gold medal performances require some serious nutrition. Have you ever wondered what these successful athletes eat to stay in peak shape? Keri Glassman, a registered dietitian and founder of Nutritious Life Meals, appeared on "Good Morning America" today to give you a glimpse into the diets of some top athletes. Some of their meals could surprise you. Crazy Calorie Count  _ One secret of swimmer Michael Phelps' astonishing performance in the 2008 Olympics in Beijing was consuming as many as 12,000 calories in one day. Athletes can eat like this and not gain any weight because their workouts are intense. According to Glassman, Phelps' workouts can burn 4,000 to 6,000 calories in a day, and those calories must be replenished   in order to train the following day. Snacking Secrets Some athletes eat wacky (strange, unusual) foods that they swear improve their performance. Yohan Blake, the Jamaica sprinter and 100-meter world champion, has been making waves for stealing champion sprinter Usain Bolt's thunder on the track during the Olympic trials. Asked about how he gets his stamina, Blake answered that he eats 16 bananas per day, Glassman said. Jonathan Horton, the lead gymnast on the US team, has a blood sugar problem. His solution is honey. When he starts to feel shaky at the gym, he takes swigs of honey to boost his energy, Glassman said. Foods for Recovery What are the best foods to help the body recover after rigorous (strict) competition? For Olympic swimmer Ryan Lochte, the recovery meal is grilled chicken breasts with Alfredo sauce, whole-grain spaghetti and a salad with lemon juice and olive oil. Lochte, who recently cut out junk food, candy and soda, has undertaken a rigorous strength-training regimen  that involves flipping tractor tires, dragging shipyard chains and tossing beer kegs, Glassman said. Question: What's the best title of this passage? Yes or no, is the answer "The Diets of some Top Olympic Athletes."?
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Article: You know eating fruit and vegetables is virtuous. But did you know it can also make you look good? People who increased their intake over just six weeks developed a healthy glow and appeared more attractive, researchers found. Scientists at St Andrews University found eating them subtly increased yellow and red pigments in the volunteers' skin. They monitored the food intake of 35 people and took pictures of their faces, arms and hands using a sensitive camera at the start, and after three and six weeks. Increasing their intake of greens by 2.9 portions a day was found to make the person look healthier and an extra 3.3 portion could enhance their attractiveness, when their photographs were rated by others. Fruit and vegetables are rich in carotenoids , which are known to protect against cell damage from pollution and UV rays, and can also prevent age-related diseases including heart disease and cancer. But while it was known eating extreme amounts of certain vegetables such as carrots could turn skin orange, it was not known a small increase was perceptible to others and was seen as  _ . A camera measured changes to the skin's redness, yellowness and lightness, and found it significantly changed in people who naturally increased their intake. These changes were not evident at three weeks. Using light sensors, the researchers showed these red and yellow hues(,) were linked with the levels of carotenoids in their skin. There are hundreds of carotenoids but those thought to have the most dramatic effect are lycopene which gives tomatoes and red peppers their red color1 - and beta-carotene found in carrots as well as broccoli, squash, and spinach. Skin color1 is also affected by chemicals called polyphenols , found in apples, blueberries and cherries, which cause blood rush to the skin surface. Question: Among hundreds of carotenoids, which are most effective?   _ Yes or no, is the answer "lycopene and beta-carotene"?
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Article: Have you ever been to the world's smallest bookstore? The World's Smallest Bookstore,whose official name is just these three words,sits quietly about 100 miles northeast of Toronto. The bookstore is about 10 feet by 10 feet,so it is easy to imagine how tiny it really is.The bookstore is open 24 hours a day.Inside the bookstore are various books,especially literary books and classic authors' works.So if you are looking for something less popular,you may get a bit disappointed there. Another special feature of this bookstore is that each book only costs three dollars.All the expenses are paid on the honor system,which means buyers should make a note of what they've bought and leave their money by themselves.So the tools of the trade in this bookstore are quite simple: pens,papers,light bulbs and a label-maker. In order to catch passers-by's attention,the billboards of the bookstore are several times bigger than the store itself.With these large eye-catchers,many people are willing to stop by and have a visit. Question: How could you buy a book from the store? Yes or no, is the answer "Choose the book(s)and leave the money there."?
