i'd like to buy a book,( )that was written by LuXun

i'd like to buy a book,( )that was written by LuXun
awhich b one cbut d all
应该选b谁告诉我为什么选B不选A啊

B
这里的不定代词ione是指代book，作同位语，one后面来一个定语从句，这个定语从句用that引导，修饰这个one。希望我能帮助你解疑释惑。

因为有that了。 如果用which应该是不加逗号 i'd like to buy a book which was written by LuXun

逗号后面是一个完成的句子，that was written by LuXun，有主谓宾，不缺成分。 用which引导的话，which要充当主语的成分。

你好！ 非限制性定语从句，已经有引导词that，用one作为同位语 如果用which则应该是I'd like to buy a book which was written by LuXun. 我想要买一本鲁迅写的书 希望对你有所帮助，望采纳。