单选题
高中英语
2023-01-31
Arctic explorers may catch colds when________.
A．they are working in the isolated arctic regions
B．they are writing reports in terribly cold weather
C．they are coming into touch again with the outside world
D．they are free from work in the isolated arctic regions
参考答案
C
答案解析
细节题。根据第二段中的“in isolated arctic regions explorers have reposed being freefrom colds until coming into contact again with infected people from the outside world by way of packages and maildropped from airplanes”可知，北极地区探险者是因为与感染了感冒病毒的人接触后才得感冒的。故本题选C。
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