do you remember those days____we spent along the seashore very happy A.when B.where C.which D.who

do you remember those days____we spent along the seashore very happy A.when B.where C.which D.who
do you remember those days____we spent along the seashore very happy .
A.when B.where C.which D.who
I shall never forget those years______I lived in the country with the farmers,___which has a great effect on my life.
A that,which B when,which C which,tat Dwhen ,who
答案是C和B
我的疑问是,两道题既然都是定语从句都是主谓宾齐全,为什么第一题用的是which 而第二题用的却是when