A.It; developing | B.As, developed | C.That; developing | D.As; developing |
A.It | B.As | C.That | D.What |
A.where | B.which | C.when | D.what |
A.It; if | B.That; whether | C.What; whether | D.What; that |
A.When | B.Where | C.What | D.How |
A.where | B.when | C.that | D.until |
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