Is there anything else___ you require? A. which B. that C. who D. what 答案是B 为什么不能选A?

题目

Is there anything else___ you require? A. which B. that C. who D. what 答案是B 为什么不能选A?
We visited the house. Lusun once lived in the house.
变为：We visited the house where Lusun once lived.
为什么不是We……lived in.？

答案

先行词为复合不定代词时,引导词用that