几道英文定语从句的题目,请达人指教

几道英文定语从句的题目,请达人指教
1.It is worthwhile to climb up to the mountain top from___ you can have a breathtaking view of the whole valley.
A.that B which C when D where
答案居然是选择D的,介词from后面怎么能跟一个关系代词呢?
2.He give his son every thing except that —— his son really needed.
A that B as C that D but
答案居然选的是which,但是 不是说出现everything只能用that的吗?
3.I spent a whole evening reading this novel about____there is so much controversy.
A which B that C whom D where
答案选择的是 which,这句话的意思可以达人分析一下吗?
第三句是定义从句吗？先行词是novel？