单项选择题

As early as 1647, Ohio made a decision that free, tax-supported schools must be established in every town （） 50 households or more.

A. having
B. to have
C. to have had
D. having had

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单项选择题
If you want （） you have to get the fund somewhere.

A. that the job is done
B. the job done
C. to have done the job
D. the job that is done
单项选择题
If I had remembered （） the window, the thief would not have got in.

A. to close
B. closing
C. to have closed
D. having closed
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