【单选题】

Mary ______ my letter, otherwise she would have replied before now.

A、has received
B、couldn’t have received
C、ought to have received
D、shouldn’t have received

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根据网考网移动考试中心的统计，该试题：

9%的考友选择了A选项

89%的考友选择了B选项

1%的考友选择了C选项

1%的考友选择了D选项