单项选择题

Not until the day before yesterday ______ to give a speech at the meeting.

A．he agreed
B．does he agree
C．he agrees
D．did he agree
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单项选择题
They regard ______ as their duty to provide the best service for their customers.
A．this
B．what
C．it
D．that
单项选择题
Although he did not feel well, he insisted going there together with us.
A．to
B．on
C．at
D．for
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