I have bought two ball pens , writes well.
A. none of them
B. neither of them
C. neither of which
D. none of which
网友回答
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。