单项选择题

Information ______ is developing at a speed mankind never thought of before.

A．transmission
B．transaction
C．transition
D．translation
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单项选择题
His client made a ______ about his carelessness in dealing with the case.
A．complaint
B．claim
C．decision
D．reservation
单项选择题
I promise you with my ______ that I'll back you up if you take the job over.
A．assurance
B．warrant
C．obligation
D．certainty
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