找考题网-背景图
单项选择题

A.older adults need more physical exercises than the yo……

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