单项选择题

A．Librarian and student.
B．Boss and secretary.
C．Operator and caller.
D．Customer and repairman.
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单项选择题
A．Thanks a lot.B．Can I help youC．What shall I doD．Here you are.
A．Thanks a lot.
B．Can I help you
C．What shall I do
D．Here you are.
单项选择题
A．$ 10.00.B．$6.00.C．$2.00.D．$8.00.
A．$ 10.00.
B．$6.00.
C．$2.00.
D．$8.00.
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