单项选择题

As it turned out to be a problem of no importance, we（）so much time looking into it.

A. needn't spend
B. didn't have to spend
C. oughtn't to spend
D. needn't have spent

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You needn't describe her. I（）her several times.

A. had met
B. have met
C. met
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They have done nothing for the coming Christmas,（）

A. we have either
B. so have we nothing
C. neither have we
D. nor have we noting
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