问题
选择题
The old man has a son and two daughters, ______ treating him well, ______ makes him sad.
A．none of them; which
B．and none of whom; that
C．none of whom; which
D．and none of them; that
答案
答案：A
第一空为独立主格结构，them为treating的逻辑主语；第二空考查定语从句，先行词指前面提到的事情关系词which指代整件事并在从句中做主语。 句意：老人有一个儿子和两个女儿，他们待他不好这使得老人悲伤。