单项选择题

A．Eating a plenty of fresh vegetables and fruits.
B．Eating pills of vitamins and trace elements.
C．Alternating work with rest.
D．Doing regular body exercises.
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单项选择题
A．To read the book by the famous British writer.B．To cover their eyes during a period of intensive reading.C．To visit doctors of traditional Chinese medicine.D．To relax their eyes frequently while reading.
A．To read the book by the famous British writer.
B．To cover their eyes during a period of intensive reading.
C．To visit doctors of traditional Chinese medicine.
D．To relax their eyes frequently while reading.
单项选择题
A．They will have time to study for it.B．Afternoons are bad times for tests.C．After it, they can prepare for other exams.D．They can start planning for their semester break.
A．They will have time to study for it.
B．Afternoons are bad times for tests.
C．After it, they can prepare for other exams.
D．They can start planning for their semester break.
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