【正文】
______Peking University. Before ______ she first went to Shaanxi to work as a ______ teacher in a high school on a oneyear educational aid program. Life in the mountains was a new ______for Yang Lei. Her village was 2020 metres ______ sea level, and at first the ______air made her feel ______. The food was very ______millet gruel three times a day. Yang Lei’s mother ______her daughter’s decision. They ______ her going there was a ______ idea. Young people today ______ to see the difficult things in the world. Most of the students live in school ______. They work very hard, ______ up