26. How did the author feel after realizing she yelled "You bastards!"?

27. What can be the best title for this passage?

　A. My life experiences in the U.S B. How I fell in love with music

C. Pop culture taught me English D. How I overcame learning difficulties

　　＂For people who are anxious about math，posture（姿势）makes giant difference," said Professor of Health Education Erik Peper. "The slumped-over（下趴）position shuts them down and their brains do not work well. They cannot think clearly." Before the study began, students filled out an anonymous questionnaire asking them to rate their anxiety levels while taking exams and performing math；they also described any physical symptoms of stress they experienced during test taking.

According to co-author Associate Professor of Health Education Richard Harvey， slumping over is a defensive posture that can cause old negative memories in the body and brain. While the students without math anxiety did not report as great a benefit from better posture, they did find that doing math while slumping over was somewhat more difficult. "You have a choice," said Peper. "It's about using an upright(垂直的) position to improve your focus."

That upright position could be particularly helpful o students facing the challenge called "stereotype（陈规旧习的）threat", said Lauren Mason, one of the paper 's authors and a recent SF State graduate. Mason said she has benefited personally from using a more upright posture before taking difficult tests, including math. She believes that adopting a more confident posture could help other first-generation students as well as women entering science and math, who often battle stereotype threat, too.

　　Mason said the study results prove a simple way to improve many aspects of life, especially when stress is involved, "The way we carry ourselves and interact in space influences not only how others think of us but also how we think of ourselves."

　　Peper and Harvey say these findings about body position can help people prepare for many different types of performance under stress, not just math tests Athletes, musicians and public speakers can all benefit from better posture before and during their performance.

28. What can be learned from Paragraph 2?

A. Most students have math anxiety.