I have bought two ball pens writes well.A. none of themB. neither of themC. neither of

问题补充：

I have bought two ball pens , writes well.

A. none of them

B. neither of them

C. neither of which

D. none of which

答案：

A. none of them

B. neither of them

(答案→)C. neither of which

D. none of which

解析：

试题分析:句意：我已经买了两支圆珠笔，两支都不好写，表示两者都不用neither.三者都不，用none.排除A.D.又因，逗号前后有两个谓语动词，is和writes,故整个句子必须用连词链接，很明显答案C，非限制性定语从句。