单项选择题

A．Mice
B．Rats
C．Monkeys
D．A，B and C
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A．The man is learning how to use a computer.B．The woman is showing the man how to put page numbers on a document.C．The man is printing a document.D．The man is using his computer to do mathematical functions.
A．The man is learning how to use a computer.
B．The woman is showing the man how to put page numbers on a document.
C．The man is printing a document.
D．The man is using his computer to do mathematical functions.
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