单项选择题

A．Happiness at different stages of life.
B．The concept of happiness.
C．Experiences of all kinds of happiness.
D．How to find happiness.
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单项选择题
A．One needs to be careful with his goal.B．Sleep walkers lack goals for success.C．Success is impossible without a goal.D．One’s goal in lire is difficult to find.
A．One needs to be careful with his goal.
B．Sleep walkers lack goals for success.
C．Success is impossible without a goal.
D．One’s goal in lire is difficult to find.
填空题
The vaccination against anthrax is only recommended to ______.
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