There are about 100 teachers two thirds of are women.A. themB. whichC. whoD. whom

问题补充：

There are about 100 teachers, two thirds of are women.

A. them

B. which

C. who

D. whom

答案：

A. them

B. which

C. who

(答案→)D. whom

解析：句意：大约有100老师，其中2/3的人是女性。逗号前后都是句子，故缺少连词，先行词是teachers,又是在介词之后所以用宾格的whom，故选D。