一道英语小题,
问题描述：
一道英语小题,
____ mothers can’t go to school today because they want to go to work
A.Mary and Lucy’s B.Mary’s and Lucy’s C.Mary and Lucy
答
__Mary and Lucy’s_ mothers can’t go to school today because they want to go to work
A.Mary and Lucy’s BMary and Lucy’s C.Mary and Lucy
选择 b,Mary’s and Lucy’s表示玛丽的妈妈和露西的妈妈（玛丽和露西不是姐妹）因为她们的妈妈不是一个人,因此要用复数mothers
a Mary and Lucy’s表示玛丽和露西的妈妈（玛丽和露西是姐妹）因此她们的妈妈是一个人,因此要用单数的mother