A.where | B.which | C.what | D.when |
A.while | B.as | C.unless | D.until |
A.while | B.as | C.before | D.until |
A.on which | B.for which | C.of which | D.along which |
A.which | B.where | C.that | D.what |
A.How long | B.How far | C.How fast | D.How much farther |
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