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 that
D．many of them
答案
答案：D
考查独立主格结构。 根据句中的dying看此处不能是从句所以排除A、B、C三个选项。 到目前为止所有的克隆动物都有不同类型的严重紊乱，好多一降生就死去了。