【正文】 little girls they teach. Young students tend to model themselves after adults of the same sex， explained Beilock， an associate professor in psychology at the University of Chicago. Little girls may learn to fear math from the women who are their earliest teachers. Beilock and her colleagues studied 52 boys and 65 girls in classes taught by 17 different teachers. Niy percent of the US primary school teachers are women， as was all of those in this study. Students’ math ability was not related to teachers’ math anxiety at the start of the school year， but at the end of the year， the more anxious teachers were about their own skills， the more likely their female students—but not the boys—were to agree to that “boys are good at math and girls are good at reading”． In addition， the girls who answered that way scored lower on math tests than either the classes’ boys or the girls who had not developed such a belief， the researchers found. After seeing the results， the researchers remended that the math requirements for obtaining a primary education teaching degree should be rethought. “If the next generation of teachers， especially primary school teachers， is going to teach their students more effectively， more care needs to be taken to develop both strong math skills and positive math attitudes in these educators,” the researchers wrote. “Girls who grow up believing females lack math skills wind up avoiding harder math classes. It keeps girls and women out of a lot of careers， particularly in science technology,” Beilock said. 24. We can learn from the first three paragraphs that ______. A. teachers in US primary schools are mostly females B. the students involved in the study are starters at primary school C. young students usually follow example of their female teachers D. it’s true that boys do well in math while girls do well in reading 25. We can we infer from the text? A. Beilock’s study will bring about a primary education revolution. B. Girls’ lack of confidence in math skills affects their future jobs. C. The performance of the students changed little during the process of the study. D. The researchers argued that current primary school education needed improving. 26. What’s the suggested solution to the phenomenon mentioned in the text? A. Using different approaches to excite students’ interest in math. B. Reducing the number of situations that make teachers anxious. C. Creating more chances for boys and girls to work together in class. D. Improving teachers’ math skills and changing their math attitudes. 27. What’s the main idea of the text? A. Girls may learn math anxiety from female teachers. B. Boys are free from the math anxiety of female teachers. C. Primary school teachers have a farreaching influence on students. D. Students should learn how to hold positive attitudes towards math. C In the late 1950s, a Russian geicist called Dmitry K. Belyaev attempted to create a tame (馴化的 ) fox population. Through the work of a breeding programme at the Institute of Cytology and Geics at Novosibirsk, in Russia, he sought to find the evolutionary pathway of tame animals. His test subjects were silverblack foxes, a melanistic (帶黑色的 ) version of the red fox that had been bred in farms for the color of their fur. He selected the animals based on how they responded when their cage was opened. About 10% of the foxes displayed a weak “wild response”, meaning they were docile around humans. Those that hid in the er or made aggressive voices were left in the farm. Of those friendly foxes, 100 females and 30 males were chosen as the first generations of parents. When the young foxes were born, the researchers handfed them. They also attempted to touch or pet the foxes when they were two to twoandahalf months old, for strictly measured periods at a time. If the young foxes continued to show aggressive response, even after significant human contact, they were thrown away from the populationmeaning they were made into fur coats. In each selection, less than 10% of tame individuals were used as parents of the next generation. By the fourth generation, the scientists started to see dramatic changes. The young foxes were beginning to behave more like dogs. They wagged their tails and “eagerly” sought contact with humans. By 20212021, almost all the foxes were playful, friendly and behaving like domestic dogs. The foxes could “read” human hints and respond correctly to gestures or glances. 28. What do we know about Belyaev’s breeding plan? A. It explains how red foxes were bred. B. It focuses on how tame animals evolved. C. It explains why pet foxes became popular. D. It concentrates on why tame animals disappeared. 29. How did he choose his test foxes in the experiment? A. By appearance. B. By color. C. By reaction. D. By flexibility. 30. What can be inferred from Paragraph 3? A. Smart foxes were used for testing. B. The purpose of selection was unclear. C. Friendly foxes were kept on testing. D. The selection was not exact and thorough. 31. What is the distinguishing characteristic of the fourth generation foxes? A. Behaving in a friendlier way. B. Eating plants. C. Having drooping ears. D. Having shortened legs. D Crossing your legs is an extremely mon habit。 most people don39。t even notice that they39。re doing it when they sit down. While you may find it fortable to sit with one knee crossed over the other, it might be causing health problems that you are not aware of. A study published in Blood Pressure Monitoring stated that sitting with your legs crossed can increase your blood pressure. The reason for this is that the blood in your legs has to work against gravity to be pumped back to your heart and that crossing one leg over the other increases resistance, making it even harder