A.where | B.when | C.until | D.that |
A.What is required | B.What requires |
C.It is required | D.It requires |
A.As | B.Since | C.When | D.While |
A.which | B.there | C.where | D.for which |
A.that | B.one | C.it | D.what |
A.which | B.that | C.what | D.it |
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