A.but whether | B.and whether | C.but how | D.and how |
A.that; which | B.that; where | C.when; where | D.which; which |
A.since; before | B.after; when | C.before; since | D.that; when |
A.what | B.that | C.anything | D.which |
A.that | B.whether | C.how | D.what |
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