单项选择题

A．Exactly $ 20.
B．Less than $ 2.
C．About $ 3.
D．About $ 30.
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单项选择题
A．A student.B．A librarian.C．A teacher.D．A part-time assistant.
A．A student.
B．A librarian.
C．A teacher.
D．A part-time assistant.
单项选择题
A．On Saturday.B．On Sunday.C．On Monday.D．On Friday.
A．On Saturday.
B．On Sunday.
C．On Monday.
D．On Friday.
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