单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．About 64%.
B．About 51%.
C．About 49%.
D．About 32%.
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单项选择题
A．The internet address.B．A giant network of computers.C．An electronic mail.D．The US postal service.
A．The internet address.
B．A giant network of computers.
C．An electronic mail.
D．The US postal service.
单项选择题
A．During their employment.B．When they have found a job.C．During their childhood.D．When they are in college.
A．During their employment.
B．When they have found a job.
C．During their childhood.
D．When they are in college.
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