A.by which | B.by that | C.through which | D.through that |
A.where | B.which | C.that | D.in which |
A.where, where | B.where, which | C.which, where | D.that, which |
A.which | B.that | C.in which | D.where |
A.where | B.which | C.when | D.that |
A.since | B.as | C.because | D.for |
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