单项选择题

New technologies and skills will speed up the ______ of information.

A．transfer
B．traffic
C．trip
D．transport
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单项选择题
She worked very hard and became a successful sales person ______.
A．or so
B．alter all
C．at last
D．right now
单项选择题
Please say hello to Mr. Smith. Not ______ his address, I can't visit him personally.
A．known
B．to know
C．know
D．knowing
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