标题: 大全809 (it的用法) [打印本页] 作者: kerry0702 时间: 2010-4-11 16:56 标题: 大全809 (it的用法) The proposed urban development zones do not represent a new principle; it was employed in “Operation Bootstrap” in Puerto Rico. (A) do not represent a new principle; it (B) represent not a new principle, but one that (C) are not a new principle; the same one (D) are not a new principle, but one that(B) (E) are not new in principle; it