请教og 202

sunyutong

202. After the Civil War, contemporaries of Harriet (Tubman's maintained that she has) all of the qualities of a great leader: coolness in the face of danger, an excellent sense of strategy, and an ability to plan in minute detail.
(A) Tubman's maintained that she has
(B) Tubman's maintain that she had
(C) Tubman's have maintained that she had
(D) Tubman maintained that she had
(E) Tubman had maintained that she has

答案选D。 我的困惑是到底什么时候of 后的名词才要使用所有格的形式。我们不是常说 a friend of Marry's。 多谢了

braveMBA

GMAT中一般不采用 A OF B's 的所有格形式

sunyutong

多谢回复. 但我还是挺想知道为什么!

rebuscat

我的理解是，如果是friends 中的一个或几个，则用's, 如果包括了全部，这里是只同时代人，全部。

joywzy

你从意思上理解该不该用.