单项选择题

Not until ten o'clock ______ the office.

A．did we leave
B．we did leave
C．we left
D．we didn't leave
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单项选择题
Is there ______ wrong with my watch No, ______.
A．something; nothing
B．nothing; everything
C．anything; nothing
D．everything; nothing
单项选择题
It wasn't such an interesting book ______ she had told me.
A．that
B．as
C．which
D．what
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