问题描述：
冠词的使用
She was ___ founder of ___ order of nuns called the Missionaries of Charity.
A.a,an B.a,/ C.the,/ D.the,an
（D)
A 和D有什么区别,为何不选A．
She was ___ founder of ___ order of nuns called the Missionaries of Charity.
A.a,an B.a,/ C.the,/ D.the,an
（D)
A 和D有什么区别,为何不选A．
问题解答：
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