Ques: Read the article and select the best answer. Article: None of our early ancestors could digest milk as adults because their bodies never had to -milk drinking simply wasn't an option.As people began to extract milk from animals, though, some people developed the ability to keep drinking it throughout their lives. Scientists mow know of a milk-related mutation in our genes--the chemical instructions for life that we carry in almost every cell in our bodies.People who have a mutated form of one particular gene can drink milk just fine.People without the mutation tend to get sick from milk. To figure out where, and possibly why, milk drinking started, some scientists have been looking at who has the milk-digesting mutation to day Pattems are striking. Most adults in Northern and Central Europe are able to digest milk--and they do.Cheese, butter and other dairy products are popular in countries such as Sweden, Denmark, Germany and England.Because European settlers dominated North America, most people here can handle milk just fine, as well.That may explain why ice cream is such a popular dessert in the United States. In much of Africa, Asia and South America, on the other hand, people tend to avoid dairy products because they lead to diarrhea and other stomach problems.(That's why you won't typically find cheese on the menu at a Chinese, Japanese or Ethiopian restaurant.) Native Americans are also unable to digest milk. Based on these genetic patterns, scientists have long thought that milk drinking started in Northern Europe, where dairy is an institution and the milk-digesting mutation is everywhere. A recent study painted a different picture.With a computer model, Thomas and colleagues looked at the spread of the milk-drinking mutation, farming and other related factors.Working backward, the scientists concluded that the first milk-drinkers lived in Central Europe around what's now Hungary about 7500 years ago.The practice didn't start farther north, as scientists had thought before. Question: Most people in the USA can digest milk because _ . Options: A: they have strong stomachs B: their ancestors were Europeans C: that's where milk drinking started D: farmers raise a lot of cows there
Ans: B

Ques: Read the article and select the best answer. Article: The robot moved into the fighting ring with confidence.Then it turned around quickly and knocked itself over. The team of Scouts that built the 8-inch -tall machine immediately realized one arm was too long.They would have to work fast---practice time was over , and the real robot matches were about to begin . "We tried to fix it , but by that time , the other teams had more advanced technology ," says Eagle Scout Matthew Patchen , 16. "They were a couple of steps ahead of us ." In the end , Matthew's team didn't win the robot competition . But they had a great time working on their Robotics merit badges at the 2011 Advance Camp in Antioch , Calif . Advance Camp is held the last Saturday in September at the Contra Costa County Fairgrounds in Antioch, Calif.Nearly 1,500 Scouts attended in 2011 and worked on different merit badges .Scouts choose from more than 50 merit -badge classes taught by counselors .They can earn merit badges from Fingerprinting to Nuclear Science to Swimming .Robotics is the most popular class . First , one of the counselors talked to Matthew and the other Scouts in his Robotic class about the many different uses for robots . "I learned how advanced it really is ," Matthew says . "Robots are used in medicine and industry ." After the talk , the Scouts were divided into five-person teams . Each team was required to build a basic robot . The next step was programming the tiny computer in the robot so it would make the right moves once it was in the ring . "We programmed our robot so its arm was moving all the time ," Matthew says . "That way , it would knock the other robot over." . That's when they discovered the arm on their robot was too long . As a result , their robot knocked itself over before it could fight with any other robots . "It was a learning experience ," Matthew says . "You have to think ahead." Question: What can we learn about the 2011 Advance Camp ? Options: A: It consisted of more than 50 five -person teams . B: It supplied various merit badges to Scouts . C: It had 1,500 counselors to teach Scouts . D: It was a camp aimed at robotics lovers .
Ans: B

Ques: Read the article and select the best answer. Article: The early 1900s were very different from today, when toys were still the delight of children everywhere. Theodore Roosevelt's Presidency marks the beginning of the "Teddy Bear". In the year 1902,toy bears were named "Teddy" after the president's nickname. The Teddy Bear became known worldwide and it was only a few years later that the Teddy Bears were mass produced. In 1913,an item called the Erector Set was invented. It was a steel,motorized toy that children could use to build models of anything. Its creator was A.C.Gilbert,a medical doctor. Charles Pajeau created a similar wooden set called Tinker Toys in the year 1914.Tinker Toys were made for younger children. Raggedy Ann dolls first came on the scene after newspaper cartoonist Johnny Gruelle reproduced the doll he made for his daughter. That was in 1915. The following year,an architect's son named John Lloyd Wright,invented Lincoln Logs,which were interlocked to make structures. Two years after Mickey Mouse was created,stuffed Mickey Mouse dolls were made by Charlotte Clark. This was the start of Disney merchandise. The yoyo became popular in the United States after Donald Duncan bought a yoyo company in 1929. The ViewMaster,a three dimensional viewer,was developed by a camera enthusiast named William Gruber. The toy became popular when Gruber licensed Disney characters to make still, 3D images from Disney movies and television programs. Finally,in 1940,model airplanes were mass produced. They started out as a way for manufacturers to sell planes to the military,but later caught on as a toy. The toys that we know and love today have had their roots from these ancient times. Thanks to all these creative man's efforts, we know otherwise what we may never know. Question: In which aspect do the toys created by Gilbert differ from those by Charles? Options: A: Shape B: Material used C: Themes D: Price
Ans:
B