单项选择题

A．Beginner.
B．Lower intermediate.
C．Upper intermediate.
D．Advanced.
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单项选择题
A．Eating more fresh vegetables and fruits.B．Taking pills of vitamins and trace elements.C．Alternating work with rest.D．Doing regular exercise.
A．Eating more fresh vegetables and fruits.
B．Taking pills of vitamins and trace elements.
C．Alternating work with rest.
D．Doing regular exercise.
单项选择题
A．Swimming pool.B．Gymnasium.C．Tennis court.D．Sauna.
A．Swimming pool.
B．Gymnasium.
C．Tennis court.
D．Sauna.
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