问题
单项选择题
—Aren't you Mary's sister
—（）. I'm her aunt.
A. Yes I am
B. No I'm not
C. Yes I'm not
D. No I am
答案
参考答案：B
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—Aren't you Mary's sister
—（）. I'm her aunt.
A. Yes I am
B. No I'm not
C. Yes I'm not
D. No I am
参考答案：B