单项选择题

A．One week.
B．Three weeks.
C．Two weeks.
D．Twenty days.
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单项选择题
A．An MP3.B．A Walkman.C．A CD player.D．He does not give a definite answer.
A．An MP3.
B．A Walkman.
C．A CD player.
D．He does not give a definite answer.
单项选择题
A．Because they have new features and functions.B．Because they are more sophisticated than other models.C．Because they have new accessories attached.D．Because it wants to accumulate funds for future research.
A．Because they have new features and functions.
B．Because they are more sophisticated than other models.
C．Because they have new accessories attached.
D．Because it wants to accumulate funds for future research.
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