单项选择题

According to the author, ______ .

A．older adults need more physical exercises than the younger ones
B．younger adults are not necessary to take a physical examination before a fitness program
C．fitness programs for older adults should be well - monitored
D．poorly-designed fitness programs for older adults will do serious harms to them

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单项选择题The author mentions that the maximum THR for older adult participants in sports should be less than ______ beats per minute.

A．60
B．120
C．180
D．240

单项选择题According to the passage ,all of the following are advisable to older adults for a fitness program except

A．wearing appropriate clothing and shoes
B．being mentally ready for physical exercises
C．including periods of warm-up and cool-down
D．avoiding any pressure to their hearts

单项选择题The last word of the passage addictive means ______ .

A．excessive
B．enthusiastic
C．dependent
D．progressive

单项选择题The passage is a piece of ______ .

A．description
B．narration
C．argumentation
D．disposition