单项选择题

(Prior to) our (conference), the (executive) director had requested that everyone (was) well prepared.

A．Prior to
B．conference
C．executive
D．was
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单项选择题
John suggested ______ anything about it until they found out more facts.
A．not to say
B．not say
C．to say not
D．not saying
单项选择题
I'd have come with you ______ I am so busy.
A．except for
B．provided that
C．but that
D．so long as
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