单项选择题

In keeping mind active ,the chief danger facing us is ______.

A．mental problems
B．lack of enthusiasm in learning
C．bad habits in eating and drinking
D．ignorance of the time slipping by
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单项选择题
Full development of man's mind depends on ______.
A．intentional efforts
B．a harmonious personality
C．health, virtue and knowledge
D．the mind, the emotion and the body
单项选择题
When offered beef to dine on ,the Indians will evoke(唤起，引起) a feeling of ______.
A．regret
B．disgust
C．repulsion
D．ethnic serf-esteem
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