单项选择题

It isn't quite ______ that he will be present at meeting.

A．sure
B．right
C．exact
D．certain
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单项选择题
By the sixth century AD, when few Europeans could read, the Chinese ______ paper.
A．invented
B．had invented
C．have invented
D．had been invented
单项选择题
I hope you don't mind me ______ you sir, but is there much money involved in the will
A．asking
B．to ask
C．ask
D．that I ask
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