单项选择题

A．People are more destructive.
B．People arc more selfish.
C．People do what they preach now.
D．People do not have moral principles to follow now.
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填空题
From this passage we may safely infer that ______ might help prevent mental declines.
单项选择题
A．Days.B．Weeks.C．Months.D．Years.
A．Days.
B．Weeks.
C．Months.
D．Years.
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