单项选择题

A．Bob is very good at running,
B．Bob works as a guard.
C．Bob never skips the professor’s class.
D．Bob is very smart.
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单项选择题
A．Forty or fifty minutes of exercise once a week.B．Twenty or thirty minutes of exercise every day.C．Fifteen or twenty minutes Of exercise five days a week.D．Thirty or forty minutes of exercise three or four days a week.
A．Forty or fifty minutes of exercise once a week.
B．Twenty or thirty minutes of exercise every day.
C．Fifteen or twenty minutes Of exercise five days a week.
D．Thirty or forty minutes of exercise three or four days a week.
填空题
I
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