单项选择题

Please refer to your personal ______number.

A． identify
B． identities
C． identification
D． identified
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______ you transfer your account, sign on the dotted line.
A． While
B． Because
C． During
D． Before
单项选择题
Our company ______ Metro Messenger Service since 1998.
A． use
B． used
C． had used
D． has been using
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