试题要求：
Helen's sisters were the greatest gifts that Mom gave Helen.
试题解析：
答案：A
解析：
由第八段可知，妈妈生了三个女儿，并且经常会告诉她们有多幸运，让她们一起玩耍，也一起受罚，目的就是想告诉她们彼此是最好的朋友，是给彼此最好的礼物。故选A。
考点：阅读判断,2015.4
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