These are some areas ___ are short of teachers and medical service.A.in which B.which C.on which D.whereWhich one?Why?

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Thesearesomeareas___areshortofteachersandmedicalservice.A.inwhichB.whichC.onwhichD.whereWhichone?Why

These are some areas ___ are short of teachers and medical service.A.in which B.which C.on which D.whereWhich one?Why?
These are some areas ___ are short of teachers and medical service.
A.in which B.which C.on which D.where
Which one?Why?

These are some areas ___ are short of teachers and medical service.A.in which B.which C.on which D.whereWhich one?Why?
B
很多地区缺乏教师资源和医疗服务
which引导定语从句修饰areas,同时在从句中作主语成分.
楼上是错的……