试题要求：
One day, one of Hele's sisters asked her to be her best friend.
试题解析：
答案：B
解析：
由文章开头妈妈和Helen的对话可知，妈妈告诉Helen，她的两个姐姐应成为她最好的朋友，而并不是Helen的一个姐姐让Helen成为她最好的朋友。题干的表述与文章不一致，故选B。
考点：阅读判断,2015.4
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