1.ThisisMr.lifor____sonIboughtabookyesterday
ThisisMr.lifor____Iboughtabookyesterday.
分别是whose和whom为什么?
2.Helivesintheroom____windowfacestothenorth.
Helivesintheroom,thewindow_____facestothenorth.
分别是whose和ofwhich为什么?
这2句的分析及句子成分