as the most excellent one in her university___as the most excellent student in her university,as most classmates had expected,made her parents very happy.A.Mary was chosen B.Mary's chosenC.Mary being chosen D.Mary's being chosen 请问ABC为什么错

as the most excellent one in her university___as the most excellent student in her university,as most classmates had expected,made her parents very happy.A.Mary was chosen B.Mary's chosenC.Mary being chosen D.Mary's being chosen 请问ABC为什么错
as the most excellent one in her university
___as the most excellent student in her university,as most classmates had expected,made her parents very happy.
A.Mary was chosen B.Mary's chosen
C.Mary being chosen D.Mary's being chosen
请问ABC为什么错,通俗易懂

as the most excellent one in her university___as the most excellent student in her university,as most classmates had expected,made her parents very happy.A.Mary was chosen B.Mary's chosenC.Mary being chosen D.Mary's being chosen 请问ABC为什么错
首先句子最主要想说的 made her parents very happy.也就是mary被选为最出色学生 所以用doing形式作为主语 doing是当做名词来对待的 所以mary的被选就是mary's being chosen

整个句子的谓语：made。句子翻译为：正如班上大多数同学所预料的那样，Mary被选为全校最优秀的学生，这事让Mary的父母也很高兴。据此可知D正确。

补充一下，A如果用作主语从句，要加连接词That，B是错误结构，C是独立主格结构，常用作状语。