单项选择题

A．To think out some difficult problems.
B．To do some cross-country running.
C．To finish a course in physical training.
D．To keep fit and healthy.
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Roz Juma
单项选择题
A．Running and thinking.B．Running and jumping.C．Running and climbing.D．Running and skiing.
A．Running and thinking.
B．Running and jumping.
C．Running and climbing.
D．Running and skiing.
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