Children in the United States eat too much pizza that some researchers now argue the food should join the ranks of sugary drinks and fast food for the harm they do to health. In a new study, the researchers found that pizza is a large source of calories, saturated fat and salt in children's diets.Children should not eat more than two slices of pizza for a meal,and should pair that with salad, rather than with another high-calorie food,the researchers concluded. "Parents should aim to control pizza consumption , particularly as a snack where it was shown to have a very adverse impact on children, and they should put their pizza dollars toward healthier brands."Said Lisa Powel, director of the Illinois Prevention Research Center. Pizza has become a matter of focus in recent years for researchers who look at the meals children eat, rather than the nutrients within them.Studies have found pizza is among the greatest sources of calories for children. "Since pizza remains a common part of children's diet, we need to make 'healthy' pizza."Powel said.To make pizza healthier, food producers should reduce its saturated fat and salt, and increase its whole grain content," she said. Whether or not pizza is harmful enough to be picked out as an unhealthy food, the study attracts attention to a larger issue with the modern American lifestyle, said Alexis Tindall, who was not involved in the flow research. "Many foods are eaten too frequently and in large sizes," said Tindall.To solve the problem, people don't have to give up eating pizza, but instead, they can eat smaller and healthier pizza,"she said. "Make it at home, instead of ordering it out where you don't have any control over how it's made." Tindall said. "When we make it at home, we can choose healthier ingredients,increase the vegetables, reduce fat, and put in less cheese.Pizza doesn't have to be just pepperoni and cheese." What is the best title for the passage? A) Pizza--a real junk food! B) How to prepare better meals for your kids? C) Discover the harm of eating pizza D) Bring in healthier pizza for Americans
D
Australian scientists are trying to give kangaroo-style stomachs to cattle and sheep in order to cut the greenhouse gases they send out, which is thought to be responsible for global warming. Thanks to special bacteria in their stomachs, kangaroo flatulence contains nomethane and scientists want to transfer that bacteria to cattle and sheep who produce large quantities of the harmful gas. While the usual image of greenhouse gas pollution is a billowing smokestack pushing out carbon dioxide, farm animals' passing wind contributes a surprisingly high percentage of total emissions in some countries. "Fourteen percent of emissions from all sources in Australia is from enteric methane from cattle and sheep," said Athol Klieve, a senior research scientist with the Queensland state government. "And if you look at another country such as New Zealand, which has got a much higher agricultural base, they're actually up around 50 percent," he said. Researchers say the bacteria also make the digestive process much more efficient and could potentially save millions of dollars in feed costs for farmers. But it will take researchers at least three years to isolate the bacteria, before they can even start to develop a way of transferring it to cattle and sheep. Another group of scientists, meanwhile, has suggested Australians should farm fewer cattle and sheep and just eat more kangaroos. And about 20 percent of health-conscious Australians have eaten the national symbol already. "It's low in fat, it's got high protein levels and it's very clean in the sense that basically it's the free-range animal," said Peter Ampt of the University of New South Wales's institute of environmental studies. Scientists intend to put the bacteria into cattle and sheep _ . A) to prevent them from sending out greenhouse gases B) to help Australian farmers to earn more money C) so that they can protect Australian ecosystem D) so that they can make full use of special bacteria
A
Q: "I would say, no matter what people tell you, anything can happen." That's the message Internet singer Austin Mahone says at We Day, an event for young people in Canada. When he was 14,Austin and a friend began uploading pop songs to musical websites."I was just doing it because we had nothing to do, living in a small town." "I'd check different websites for the hottest songs, and I'd record my own videos," he explains. "That's how people began to find me online."His videos got millions of hits and he signed with a record company. The result was the release of Austin's first album,Junior Year. While it seems like a sudden rise for the teenager, Austin admits the early days were not always fun. He says a lot of people thought badly of him for posting his videos online. Yet _ didn't put him off."I kept working hard. "And the hits on his videos kept coming. Austin's achievement and spirit make him a perfect fit for the message of We Day. After all, Free the Children, the creator of the event, was founded to "enable youth to make changes." Even Austin's unusual rise by way of the Internet fits with the way Free The children works and raises money. Because of Austin, his four million followers will learn about Free the Children. While Austin's presence certainly helps We Day, it's good for him, too. Austin gets to show himself as someone who volunteers his time and talent for a worthy cause and show that he cares about making the world a better place. Why did Austin put pop songs on musical websites? A) He was bored with his life there. B) To attract people's attention. C) To help advertise the songs. D) His friend asked him to do so.
A: A
Q: Rush hour traffic is a problem in many big cities around the world. Commuters rush to and from their jobs in cars, buses, subways, trains, and even on bicycles. Large cities in the United States have two rush hours--one in the morning and one in the evening. But in cities in other parts of the world, there are four rush hours. In Athens and Rome, for example, many workers go home for lunch and a nap. After this midday break, they rush back to their jobs and work for a few more hours. In Tokyo, there's a big rush hour underground. Most of the people in Tokyo take the subways. The trains are very crowded. Subway employees called packers wear white gloves and help pack the commuters into the trains when the doors close. They make sure that all purses, briefcases, clothes, and hands are inside the trains. In Seoul, many commuters prefer to take taxis to get to work.. To hail a cab,many people stand at crossroads and raise two fingers. This means they'll pay the cab driver double the usual fare. Some people even raise three fingers! They'll pay three times the normal rate. Streets in Rome are very crowded with automobiles and mopeds during rush hours. The city can't make its streets wider, and it can't build new highways, because it doesn't want to disturb the many historic sites in the city, such as the Forum and the Coliseum. It took the city fifteen years to construct a new subway system. Construction had to stop every time workers found old artifacts and discovered places of interest to archaeologists . In many big cities, there are special lanes on highways for carpools. These are groups of three or more people who drive to and from work together. They share the costs of gas and parking and take turns driving into the city. Getting to work and getting home can be difficult in many places around the world. Rush hour traffic seems to be a universal problem. Big cities have traffic problems during rush hours because there are _ A) special lanes on highways B) many commuters C) four rush hours D) many cars on the street
A: B