单项选择题

"Mary has a headache." "It"s been hurting her for a long while, ______"

A．hasn"t it
B．isn"t it
C．wasn"t it
D．doesn"t it
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单项选择题
I told them not everybody could do it, ______
A．haven"t I
B．didn"t I
C．couldn"t he
D．could he
单项选择题
I don t think you judged your ability objectively when you applied for it, ______ you
A．do
B．don"t
C．didn"t
D．did
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