Question

Do you know who lives in the building ________ there is a wall?

1. A.
   in front of
2. B.
   in front of whose
3. C.
   in front of which
4. D.
   in front which

Answer 1

C
解析：
the building是先行词，可以看出，定语从句表达的意思是“在建筑物的前面有一堵墙”，即in front of the building there is a wall，显然，引导词要代替the building作定语从句中of的宾语。