单项选择题
A．about whom B．about who C．whom D．who
Author Edith Wharton thoroughly understood the society（...
单项选择题Author Edith Wharton thoroughly understood the society（）she had grown up.
A．in which B．which C．in that D．that
The knee is the joint（）the thigh bone meets the large b...
单项选择题The knee is the joint（）the thigh bone meets the large bone of the lower leg.
A．when B．where C．that D．which
After he has written his paper, he found some additiona...
单项选择题After he has written his paper, he found some additional material（）he should have included.
A．that B．of which C．in which D．whom
