Talking about that is useless, _________________ is familiar to me.

Talking about that is useless, _________________ is familiar to me.
[A] Which fact [B] The fact of which [C] Is fact [D] That fact
为什么选B？？？请翻译句子，谢谢

talking about unusual happenings I don't know what you're talking about帮忙解释下,谢谢~~~ 英语作文：Talking about time talking about Chinese feng shui talking about romances on campus At the meeting,they sat very _and had a _talk,but Ididn't know what they were talking about what are you talking about 中文是什么意思 英语短文 Talking about learning Englishi Tom and fred are talking about 选择:What are you talking about?