【RedsquirrelsusedtobeacommonsightinBritishforestsandcountryside．Buttherearefewerthan140，000redsquirrelsleftnowandmostofthemareinScotland．However，greysquirrels（introducedfromNorthAmerica）arenowsocommon

问题：【RedsquirrelsusedtobeacommonsightinBritishforestsandcountryside．Buttherearefewerthan140，000redsquirrelsleftnowandmostofthemareinScotland．However，greysquirrels（introducedfromNorthAmerica）arenowsocommonth】

答案：↓↓↓

冯萍慧的回答：

网友采纳　　69．Grey squirrels．细节理解题．题意：红松鼠和灰松鼠，哪一种是从北美洲介绍来的？根据第一段最后一句：However，grey squirrels （introduced from North America） are now so common that many p...