单项选择题

A．It is advantageous to the brains.
B．It helps strengthen the heart.
C．It is good for improving muscle tone.
D．It helps develop mental toughness.
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单项选择题
A．About 625 days.B．About 700 days.C．About 750 days.D．About 500 days.
A．About 625 days.
B．About 700 days.
C．About 750 days.
D．About 500 days.
单项选择题
A．Driving larger cars.B．Driving larger and lighter cars.C．Driving lighter and smaller cars.D．Driving oversized cars.
A．Driving larger cars.
B．Driving larger and lighter cars.
C．Driving lighter and smaller cars.
D．Driving oversized cars.
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