问题
选择题
So far all cloned animals have suffered from some different serious disorders, _______ dying soon after birth.
A．many of which
B．many of whom
C．many of them
D．many of that
答案
答案：C
本题考查独立主格结构。分析句中可知，后面一句没有谓语动词，故非考查定语从句，代词them指代disorders，故选C。
