求高手指导几道英语选择题...关于定语从句的

求高手指导几道英语选择题...关于定语从句的
The small mountain village ____ wo spent our holiday last month lies in ____ is now part of Hubei.
A which;where B where;what C that;which D when; which
看第一空我也觉得要选B,可是看了第二空,为了将就第二空,我又选了D.
Anyway,that evening,____ I'll tell you more about later,I ended up staying at Rachel's place.
A when B where C what D which
我选的是A,后面有缺成分吗?
We often have to work on Sundays,____ we don't like.
A though B which C so D but
我选的是A,我觉得是表转折吖...
Father is black in March,by ____ our garden will come into a mass of blossom.
A which B that C whom D when
我选的是A,by+when?想不通...
第二题有疑问，即使是缺宾语也不是它的先行词可以带进去的吖...
第四题也有，by后为什么不用which反而用when？