单项选择题

A．Librarian and student.
B．Operator and caller.
C．Boss and secretary.
D．Customer and repairman.
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单项选择题
A．thereB．whenC．whichD．where
A．there
B．when
C．which
D．where
单项选择题
A．littleB．fewC．muchD．many
A．little
B．few
C．much
D．many
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