The old farmer has one son and two daughters are kind to her makes her sad.A. neither of

问题补充：

The old farmer has one son and two daughters, are kind to her,makes her sad.

A. neither of them; which

B. all of whom; which

C. none of them; it

D. none of whom; which

答案：

A. neither of them; which

B. all of whom; which

C. none of them; it

(答案→)D. none of whom; which

解析：考查非限制性定语从句：第一空的先行词是one son and two daughters所以排除A项，句意：老农民有一个儿子和两个女儿，他们没有人对她好的，这使她很难过。排除B，第二空是非限制性定语从句，修饰前面的句子，用which，选D。