As early as 1637, Ohio made a decision that free tax supported schools must be established in every town______40 households or m

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问题 As early as 1637, Ohio made a decision that free tax supported schools must be established in every town______40 households or more.

选项 A、having
B、to have
C、to have had
D、having had

答案A

解析 本题空格处是说每个市镇有40户住户或更多。根据句子结构,空格后的部分是修饰"every town",作定语,应选择分词"having"。因此A项为正确答案。
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