单项选择题

A．It increased the students’ white blood cell.
B．It increased some students’ energy level.
C．It improved the students’ ability to play musical instruments.
D．It released a natural painkiller in some students’ bodies.
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单项选择题
A．The Sources of strength.B．Body building.C．Strong heart.D．Strength, fitness and endurance.
A．The Sources of strength.
B．Body building.
C．Strong heart.
D．Strength, fitness and endurance.
单项选择题
A．Differences between peoples will gradually disappear.B．The tourism industry will become flourishing.C．The world will become more and more interesting..D．People in different countries will still keep their own customs.
A．Differences between peoples will gradually disappear.
B．The tourism industry will become flourishing.
C．The world will become more and more interesting..
D．People in different countries will still keep their own customs.
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