Read the article and select the best answer. Article: Most American kids love Halloween treats, but a bucket of Halloween candy can be a dentist's nightmare. Some parents try to get rid of half of the candy after their children go to bed, but dentists say parents also need to separate the good kinds of treats from the bad. It is not exactly what a child eats that truly matters, but how much time it stays in his mouth. According to pediatric dentist Dr. Kaneta Lott, the most damaging stuff is something that is sticky or very hard and thus stays in the mouth for a long time. This is because we all have bacteria in our mouths. When we eat, the bacteria take our food as their food and produce an acid that destroys the surface of the teeth, causing cavities to form. The longer the food stays in the mouth, the more likely cavities will develop. Therefore, potato chips are worse than candy because they get stuck between teeth. For the same reason, raisins and crackers are not the best choice. Hard candies take a long time to consume and are also a bad choice for Halloween treats. If children really love candy, dentists recommend that they eat chocolate instead. Unlike hard candies, chocolate dissolves quickly in the mouth. Besides, chocolate contains tannins, which help to kill some of the bacteria in the mouth. But no matter what a child eats, brushing after each meal is still the best way to fight cavities. Question: According to the passage, which of the following is true of tannins? Options: A: They are produced when the bacteria digest the food. B: They help to get rid of some bacteria in the mouth. C: They help chocolate to dissolve more quickly. D: They destroy the surface of the teeth.
B

(Question)
Read the article and select the best answer. Article: The painter Georgia O'keeffe was born in Wisconsin in 1887 and grew up on her family's farm. At seventeen she decided she wanted to be an artist and left the farm for schools in Chicago and New York, but she never lost her bond with the land. Like most painters, O'Keeffe painted the things that were most important to her, and nearly all her works are simplified portrayals of nature. O'Keeffe became famous when her paintings were discovered and exhibited in New York by the photographer Levered Stieglitz, whom she married in 1924. During a visit to New York in 1929, O'Keeffe was so moved by the bleak landscape and broad skies of the Western desert that she began to paint its images. Cows' skulls and other bleached bones found in the desert figured prominently in her paintings. When her husband died in 1946, she moved to New Mexico permanently and used the horizon lines of the desert, colorful flowers, rocks, barren hills, and the sky as subjects for her paintings. Although O'Keeffe painted her best known works in the 1920's, 1930's and 1940's, she continued to produce tributes(, ) to the Western desert until her death in 1986. O'Keeffe is widely considered to have been a pioneering American modernist painter. While most early modern American artists were strongly influenced by European art, O'Keeffe's position was more independent. She established her own vision and preferred to view her painting as a private endeavor. Almost from the beginning, her work was more indentifiably American than that of her contemporaries in its simplified and idealized treatment of color, light, space, and natural forms. Question: Why is O'Keeffe considered an artistic pioneer ? Options: A: Her work became influential in Europe. B: She painted the American Southwest. C: Her paintings had a definite American style. D: She painted things that were familiar to her.
(Answer)
C

Ques:Read the article and select the best answer. Article: Phillida Eves and her husband Tedd Hamilton weren't unhappy living in the Galway countryside with their sons, Cian and Oisin, and their daughter, Soracha. "We had a lovely home , a car, lots of friends, and weekends sailing our boat", says Phillida. "But there's a line from a poem that goes: 'Tell me, what is it you plan to do with your one wild and precious life?' That says it all for me. We felt that there was more to life." So they quit their jobs, took their sons, then aged six and nine, out of school and went to southern Spain where they bought a 15-meter yacht and headed up the coast to Barcelona. Soracah was not even three. And they brought along Poppy, the family dog. Now, two and a half years and 10,000 km later, they don't intend to stop. Tedd is a yacht engineer and can find work in ports. But, says Phillida, a supply teacher , "Any family could do this". The children are home-schooled using a correspondence course . My son had a recent project on the weather. The weather is vital to us. My son knows more than most adults about weather systems, compasses, maps and directions. The weather, for him, means life or death. Other subjects have become equally vivid. "They're living geography and history all the time. We've sailed round Italy, Sardinia, Sicily, and seen tiny islands we didn't know. The kids learned about ancient Romans by visiting Rome. One summer off the Italian coast we sailed past a volcano at 2am. We woke the kids. There it was, under the moon, with fire coming out the top--you don't get that in a textbook." But what about social development? Again, Phillida is _ . "The children have become much more socially confident since we set out. They play with tones of families of all nationalities on other boats we meet." Living for the moment, they believe, is a huge life lesson. "Our children never say they're bored." The other day they stopped mid-ocean and the kids swam, 110km from land. "That's the kind of freedom we want for them," says Phillida. "That's the kind of freedom they've got." Question: The author describes the children's home schooling by _ . Options: A: using examples B: making comparisons C: following the order of importance D: describing the changes in space order

Ans:
A