A.to which | B.during which | C.on which | D.for which |
A.how | B.why | C.where | D.which |
A.before | B.when | C.since | D.until |
A.What; that | B.What; what | C.That; what | D.That; that |
A.when | B.where | C.which | D.that |
A.It is only then; that | B.It was that; when |
C.It is only when; that | D.It was when; then |
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