I'm taking a test and have to guess the right answer to the question after the article. Article: American researchers say drinking tea may help strengthen the body's defense system against infection. Doctors at Brigham and Women's Hospital in Boston, Massachusetts, did the study. The team studied a chemical found in black, green, oolong and pekoe tea. This chemical is an amino acid called L-theanine. The scientists say it may increase the strength of gamma delta T cells. That's the letter T, not the drink. Gamma delta T cells are part of the body's defense. First, the researchers mixed some of these cells with antigens found in the amino acid . Antigens help the body react to infection. Then the scientists added some bacteria. Within twenty-four hours, the cells produced a lot of interferon, a substance that fights infection. Cells not mixed with the antigens did not produce interferon. In the second part of the study, eleven people drank five to six cups of black tea every day. Ten other people drank the same amount of instant coffee. That is dried coffee mixed with hot water. Two weeks later, and again two weeks after that, the researchers tested the blood of all twenty-one people. They also looked at what happened when they added bacteria to the blood cells. They found that the tea drinkers produced five times more interferon after they started drinking tea. The coffee drinkers did not produce interferon. Doctor Jack Bukowski led the study. He says the antigens added to the gamma delta T cells were responsible for the increased reaction to the bacteria. He says that the study also showed that the cells were able to remember the bacteria and fight them again the next time. Earlier research already has found that tea can help prevent heart disease and cancer. Doctor Bukowski says the new study must be repeated by more people. "If the findings prove to be true," he says, "then tea drinking might also help protect against bacterial infections." He says the amino acid L-theanine could be removed from the tea and used as a drug to strengthen the body's defenses. Question: What would be the best title for this text? Options: A: Tea Is Better than Coffee B: Our Body Needs Tea C: Tea Can Help Prevent Cancer D: Tea May Help Fight Infection
D

I'm taking a test and have to guess the right answer to the question after the article. Article: Although April did not bring us the rains we all hoped for, and although the Central Valley doesn't generally experience the sound and lightning that can go with those rains, it's still important for parents to be able to answer the youthful questions about thunder and lightning. The reason these two wonders of nature are so difficult for many adults to explain to children is that they are not very well understood by adults themselves. For example, did you know that the lightning we see flashing down to the earth from a cloud is actually flashing up to a cloud from the earth? Our eyes trick us into thinking we see a downward motion when it's actually the other way around. But then, if we believed only what we think and we see, we'd still insist that the sun rises in the morning and sets at night. Most lightning flashes take place inside a cloud, and only a few can be seen jumping between two clouds or between earth and a cloud. But, with about 2,000 thunderstorms taking place above the earth every minute of the day and night, there's enough _ to produce about 100 lightning strikes on earth every second. Parents can use thunder and lightning to help their children learn more about the world around them. When children understand that the light of the lightning flashing reaches their eyes almost at the same moment, but the sound of the thunder takes about 5 seconds to travel just one mile, they can begin to time the interval between the flash and the crash to learn how close they were to the actual spark . Question: It can be concluded from the passage that _ . Options: A: we should not believe what we see or hear. B: things moving downward are more noticeable. C: people sometimes may have wrong ideas about ordinary phenomena. D: adults are not as good as children in observing certain natural phenomena.
C

I'm taking a test and have to guess the right answer to the question after the article. Article: White House Tours Members of the public can visit the White House now. Requests must be made through one's Member of Congress . These self-guided tours are available from 7:30 am to 11:00 am Tuesday through Thursday, 7:30 am to 12:00 pm Fridays, and 7:30 am to 1:00 pm Saturdays (except for holidays). Requests can be made up to six months in advance and no less than 21 days in advance. All White House tours are free. If you wish to visit the White House and are a citizen from a foreign country, please contact your embassy for help in making a tour request. All visitors 18 years of age or older will be required to present a valid photo ID. All foreign visitors must present their passport. All other forms of foreign identification will not be accepted. All visitors should call the 24-hour Visitors Office information line at 202-456-7041 to determine if any last minute changes have been made in the tour schedule . Forbidden Items: l Cameras or video recorders l Handbags, book bags, backpacks or purses l Food, drinks, or cigarettes l Any pointed objects l Guns, or knives of any size The U.S. Secret Service has the right to forbid any other personal items. Umbrellas, car keys, and cell phones (including those with cameras) are permitted. However, guests will not be allowed to use cell phones inside the White House. Please note that there is no place to store forbidden items for visitors. Those who arrive with forbidden items will not be allowed to enter the White House. Restrooms / Public telephones The nearest restrooms and public telephones to the White House are in the Ellipse Visitor Pavilion (the park area south of the White House). Restrooms and public telephones are not available at the White House. The Disabled Please contact your Member of Congress if you cannot hear or see clearly and need help during your White House tour. Guide animals are permitted in the White House. Question: Which of the following is forbidden to be taken into the White House? Options: A: car keys. B: cell phones. C: umbrellas. D: backpacks.
D

I'm taking a test and have to guess the right answer to the question after the article. Article: The Winter Olympics is also called the White Olympics. At that time, many color1ful stamps are published to mark the great Games. The first stamp marking the opening of the White Olympics was issued on January 25th, 1932 in the United states to celebrate the 3rd White Olympics. From then on, issuing stamps during the White Olympics became a tradition. To observe the 4th Winter Olympic Games, a group of stamps were published in Germany in November, 1935. The five rings of the Olympics were printed on the front of the sportswear. It was the first time that the symbol appeared on stamps of the Winter Olympics. In the 1950s, the stamps of this kind became more color1ful. When the White Olympics came, the host countries as well as the non-host countries published stamps to mark those Games. China also published four stamps in February, 1980, when the Chinese sportsmen began to march into the area of the Winter Olympics. Japan is the only Asian country that has ever held the White Olympics. Altogether 14,500 million stamps were sold to raise funds for the sports meet. Different kinds of sports were represented on these small stamps. People can enjoy the beauty of the wonderful movements of the athletes. Question: The White Olympics and the Winter Olympics are _ . Options: A: of the same meaning B: of difference in meaning C: two different sports D: two dangerous sports
A