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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单项选择题
I have kept that picture ______ I can see it every day as it always reminds me of my university days in London.
A．in which
B．which
C．where
D．when
单项选择题
It was in the village ______ now is a small town ______ the earthquake occurred
A．where, which
B．which, where
C．which, that
D．that, where
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