A、1,970. B、1,980. C、4,700. D、2,600. D题目问进入奥运会体育馆的运动员人数。新闻中提到，有来自超过80个国家和地区的大约2600名运动员，在20世纪七八十年代的美国流行音乐的伴奏下，齐步走进体育馆。故D项正确。

A crowd of some 35,000, including U.S First Lady and Italian film star Sophia Loren, filled the Olympic Stadium. More than 4,700 performers, including fast-moving skaters with crazy rocket packs, dancers and even dancing cows opened the festivities. Some 2,600 athletes from more than 80 countries and territories marched into the stadium accompanied by American pop music from the 1970s and 1980s. The worldwide television audience was estimated at around two billion. Following more than two hours of celebration, International Olympic Committee president Jacques Rogge addressed the athletes. "Please compete in the spirit of fair play, mutual understanding, and respect. And above all, please compete cleanly by refusing drugs". Then, the president of the Italian Republic, Carlo Azeglio Ciampi officially opened the Games. "I declare open in Turin the celebration of the Winter Olympic Games," he said. The musical highlights of the show included an appearance by the late John Lennon’s wife, Yoko Ono, and his song "Imagine" sung by Peter Gabriel. The entertainment was capped off with a performance by Italian tenor Luciano Pavarotti.
5 How many athletes marched into the Olympic Stadium?
6 What’s the most important quality to compete in the Olympics?
7 Which song was sung in the opening ceremony of the Winter Olympic Games?