As early as 1647..As early as 1647 Ohio made a decision that free, lax-supported schools must be established in every town___50 households or more. A. having B to have C.to have had D. hav

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As early as 1647..As early as 1647 Ohio made a decision that free, lax-supported schools must be established in every town___50 households or more.                                                           A. having  B to have  C.to have had   D. hav

As early as 1647..As early as 1647 Ohio made a decision that free, lax-supported schools must be established in every town___50 households or more. A. having B to have C.to have had D. hav
As early as 1647..
As early as 1647 Ohio made a decision that free, lax-supported schools must be established in every town___50 households or more. A. having B to have C.to have had D. having had

As early as 1647..As early as 1647 Ohio made a decision that free, lax-supported schools must be established in every town___50 households or more. A. having B to have C.to have had D. hav
A吧

A. having
定语从句修饰town
有50或更多人家的小镇

选A。
A:having在这里与with的用法差不多,可互用;
B、C:to v也可以作后置定语,但在我看来多用于被动,如sth to eat/do/say, etc;
C、D:毋须用过去完成,因为是与主句位于同一时间的。