Put the following into correct order according to the passage.
① Nadia went to the Olympics in Canada.
② A PE teacher saw her doing cartwheels on the playground.
③ Nadia went to the capital to train.
④ She was looked as a hero.

参考解析：

细节理解题。结合文章第二段第一句“When she was doing cartwheels (侧手翻) on the playground at the age of 7, a PE teacher saw her”可知，首先是老师看见她在做侧手翻；结合后文“He told her family that she was very good and advised Nadia to train in the capital of Romania. Although it was a long way from her home, Nadia went because she loved gymnastics (体操)”可知，Nadia之后去训练；结合文章第四段第一句“In 1976, Nadia went to the Olympics in Canada”可知，Nadia参加奥林匹克；紧接着后面又提及“From then on, she was looked as a hero”，因此之后被认为是英雄。故选A。