单项选择题

A．At 5 years old.
B．At 6 years old.
C．At 7 years old.
D．It’s not
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单项选择题
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.
单项选择题
A．ofB．toC．withD．for
A．of
B．to
C．with
D．for
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