单项选择题

If I knew the answer, I wouldn't be asking, ______

A．didn't I
B．did I
C．would I
D．wouldn't I
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单项选择题
Sir, you ______ be sitting in this waiting room. It is for women and children only.
A．oughtn't to
B．can't
C．won't
D．needn't
单项选择题
The thing that ______ is not whether you fail or not , but whether you try or not.
A．matters
B．cares
C．considers
D．minds
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