有几道高中英语语法题,

有几道高中英语语法题,
1.The hotel( )during our holidays stands by the seaside.
A.we stayde at B.where we stayed C.we stayed D.in that we stayed
为什么不能选B请高手指教一二.
2.The man,with( )son I work,looked down upon women.
A.whom B.who C.whose D.his
3.The boy,( )the old man's grandson is very lovely
A.who I thin is B.whom I think is C.who I thin it is D.who I think
下面的是个选错题：
1.People are animals (who A) (needs B) depend on (what C) they have already had and on those needs that (have not been satisfied D) can affect their action