解析：As early as 1637 Ohio made a decis_考试试题_在职攻硕英语

【单选题】 As early as 1637 Ohio made a decision that free, tax supported schools must be established in every town ______ 40 households or more.
A．having
B．to have
C．to have had
D．having had

网考网参考答案：A
网考网解析：
[解析] 根据句子结构，空格后的部分是修饰every town，作定语讲，应选择分词having。查看试题解析出处>>