单项选择题

A．When we are tired.
B．When we have a balanced diet.
C．When we can relax.
D．When we do regular exercise.
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单项选择题
A．He had better stop taking the cough medicine.B．He will take another medicine instead of this.C．He should have patience to cure his cough.D．He should take the medicine for a long time.
A．He had better stop taking the cough medicine.
B．He will take another medicine instead of this.
C．He should have patience to cure his cough.
D．He should take the medicine for a long time.
单项选择题
A．In cold areas.B．In warm areas.C．In hot areas.D．In both cold and warm areas.
A．In cold areas.
B．In warm areas.
C．In hot areas.
D．In both cold and warm areas.
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