单项选择题


Questions 9 to 11 are based on the conservation you have just heard.

A．A bank clerk and customer.
B．Waiter and diner.
C．Professor and student.
D．Manger and secretary.
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单项选择题
A．He does not know how to open the computer.B．He does not know how to send an E-mail.C．He does not know how to write an E-mail.D．He does not know how to change a word.
A．He does not know how to open the computer.
B．He does not know how to send an E-mail.
C．He does not know how to write an E-mail.
D．He does not know how to change a word.
单项选择题
A．10 points.B．2 points.C．15 points.D．5 points.
A．10 points.
B．2 points.
C．15 points.
D．5 points.
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