acknowledge mistakes, imperfections, knowledge gaps and limitations.

Since shy people have a lower sensitivity to outside rewards than outgoing ones, they're more comfortable working with little information and sticking to their inner desires. Shy people are also more likely to insist on finding solutions that aren't primarily apparent. Don't believe me? Maybe you'll believe Albert Einstein, who once said, "It's not that I'm so smart, it's that I stay with problems longer." Obviously, finding certainty where uncertainty is typically popular is a huge plus for any successful person.

The myth that shy people are less effective leaders than their outgoing fellows is just a misunderstanding. Make wise use of your personality strengths to lead your business no matter what side of the range you fall on.

28. We can learn from Paragraph 2 that ___________.

A. shy people are sensitive to rewards

B. shy people care more about content

C. outgoing people are more careful about chances

D. outgoing people consider what to learn while listening

29. The example of Johnny shows ____________.

A. shy people are likely to be modest

B. hardworking students speak little in public

C. some students keep silent on purpose at school

D. shy people may have an advantage in discussion

30. We can learn from the underlined sentence in Paragraph 5 that ____________.

A. success results from devotion B. shyness contributes to popularity

C. outside reward leads to insistence D. uncertainty counts more than certainty

31. The author supports his ideas mainly by ____________.

A. giving definitions and presenting research results

B. explaining problems and providing solutions

C. quoting authorities and making evaluations

D. making contrasts and giving examples

　　Runners who encounter visual and auditory(听觉的) distractions may be more likely to suffer leg injuries, according to a research by the Association of Academic Physiatrists in Las Vegas. Runners often seek distractions from the task at hand. Whether it is music, texting, daydreaming, taking in the sights, or propping a book up on the treadmill(跑步机), more often than not a distraction is welcome. But, researchers from the University of Florida have recently discovered that those distractions may lead to injury.

　　Daniel Herman, MD, PhD, assistant professor at University of Florida, and his team conducted a research on the effect of visual and auditory distractions on 14 runners to determine what effect, if any, these distractions would have on things such as heart rate, how much a runner breathes per minute, how much oxygen is consumed by the body, the speed in which runners apply force to their bodies, and the force the ground applies to the runners' bodies when they come in contact with it.

The runners were all injury free at the time of the study and ran 31 miles each week. Dr. Herman's team had each participant run on a treadmill three separate times. The first time was without any distractions. The second time added a visual distraction, during which the runners concentrated on a screen displaying different letters in different colors with the runners having to