【单选题】

___________ over 100 years since the invention of the square-bottomed paper bag.
A．( Now is

B．( Now it has
C．( There is now
D．( It is now

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根据网考网移动考试中心的统计，该试题：

5%的考友选择了A选项

17%的考友选择了B选项

3%的考友选择了C选项

75%的考友选择了D选项

___________ over 100 years since the invention of the square-bottomed paper bag.A．( Now is