单项选择题

A．the workout involve various jumps
B．one does not use an elevator but climbs stairs
C．one walks to run most of the errands
D．one switches from being inactive to active
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单项选择题
A．Housework.B．Lawn-mowing.C．Table tennis.D．Out-of-the-gym activities.
A．Housework.
B．Lawn-mowing.
C．Table tennis.
D．Out-of-the-gym activities.
单项选择题
A．burn caloriesB．build musclesC．relieve back painsD．reduce high blood pressure
A．burn calories
B．build muscles
C．relieve back pains
D．reduce high blood pressure
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