Question 3 is based on the news report you have just heard.

听力原文

    (3) A small plane with two sick U.S. workers arrived safely in Chile late Wednesday after leaving Antarctica in a daring rescue mission from a remote South Pole research station. After making a stop for a few hours at a British station on the edge of Antarctica, the two workers were flown to the southernmost Chilean city of Punta Arenas. In a chaotic two days of flying, the rescue team flew 3,000 miles round-trip from the British station Rothera to pick up the workers at the U.S. Amundsen-Scott Station at the South Pole. “The two patients aboard will be transported to a medical facility that can provide a level of care that is not available at Amundsen-Scott,” says a spokesperson. (4) Normally, planes don’t go to the polar post from February to October because of the dangers of flying in the pitch-dark and cold. “Antarctica creates a hostile environment,” says the operations director for the British Antarctic Survey. “If you are not careful, it’ll come around and bite you.”

3. What was the small plane’s mission to Antarctica?

解析：C。根据录音开始可知，一架载有两名患病美国工作人员的小型飞机在冒险执行救援任务后，从南极一个偏远研究站出发，于星期三晚间安全抵达智利。C选项中的two sick American workers是对录音中two sick U.S. workers的同义替换，故正确答案为C。A、B、D项在录音中均未提及，故排除。