1.Cathy was a teacher from Newcastle,( A ) is almost as far north as you can go.
A.who B.which C.that D.where
此句主语为人,排除C、D,又因为有逗号,为非限制性定语从句,不可用that
2.The new research center will be set up ( ) was a wasteland 20 years ago.
A.in what B.where C.in which D.there
选B,此句没有先行词,故为地点性状语从句,应用where