单项选择题

Older people are generally advised to______.

A．keep fit by going in for physical activities
B．keep mentally active by challenging their brains
C．maintain mental alertness through specific training
D．maintain a balance between individual and group activities

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热门试题

单项选择题

According to the passage, if the price in the machine is too high, the cause(s) may be______.

A．a computer error
B．carelessness
C．dishonesty
D．B or C

单项选择题

People who are cognitively healthy are those______.

A．who can remember large amounts of information
B．who are highly intelligent
C．whose minds are alert and receptive
D．who are good at recognizing different sounds