C Fei­Fei Li arrived in the US from China at age 16 with many big dreams.And it took many unusual jobs to help her achieve them.Luckily , she was smart and extremely driven.And today , she's the director of Stanford University's artificial intelligence lab. “ As one of the leaders in the world for AI , I feel much excitement and responsibility to create the most awesome and excellent technology for society and to educate the most awesome and excellent technologists—that's my calling . ” Li said. She is also a loyal advocate for diversity in the tech industry. “ I see extremely talented Stanford PhD students struggling with their visas and I find it unthinkable that we create so many barriers for the talents of the world ,” Li said.While Li was in college at Princeton , she borrowed money from friends and even her high school math teacher to run a dry­cleaning business for her parents in order to help them get by.Li attended classes during the weekdays and worked at the business on the weekends.Then , when Li was in graduate school , her mom developed cancer and had a stroke ( 中风 ) . It was difficult to keep moving ahead while all of this was happening. “ The real existential challenge is to live up to your fullest potential , live up to your sense of responsibility and to be honest to yourself about your dreams while doing it ,” she said. Li was named a Great Immigrant of 2016 by the Carnegie Corporation , the nation's oldest grant making foundation which honors roughly 40 naturalized US citizens each year.Her graduate studies were supported by the Paul & Daisy Soros Fellowships for New Americans. 28 . What do we know about Fei­Fei Li according to Paragraph 1? A . She was born in the United States of America. B . She worked very hard because she was not gifted. C . She has made many of her dreams come true. D . She's now doing researches on AI in China. 29 . What does the underlined word “calling” in Paragraph 2 refer to? A . Interest in technology. B . Desire to help. C . Creativity in science. D . Sense of duty. 30.What was Fei­Fei Li's life like before she graduated from university? A . She had been struggling with her visa. B . Both her parents suffered from illness. C . Her family was faced with a tight budget. D . It was difficult for her to attend classes. 31 . Fei­Fei Li has achieved success because ________. A . she was lucky enough to borrow money from others B . an American foundation gave her support C . the Carnegie Corporation named her a Great Immigrant D . her awareness of her duty and goals made a difference