单项选择题
As early as in 1647 Ohio made a decision that flee, tax-supported schools must be established in every town to have 50 households or more. ()
A.has
B.having
C.having had
D.had
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单项选择题
Were it not for the timely investment from the general public, our company would not be so thriving as it is. ()
A.Be it not
B.Should it not be
C.It had not been
D.Had it not been
