单项选择题

A．Memory.
B．Two kinds of memory.
C．Short-term memory.
D．An experiment on students.
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单项选择题
A．She asked for $15.B．She donated $ 50.C．She requested $ 20.D．She gave $10.
A．She asked for $15.
B．She donated $ 50.
C．She requested $ 20.
D．She gave $10.
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