单项选择题

What should Tom do to improve his situation

A．Go to an eye doctor.
B．Improve his computer skills.
C．Take more frequent breaks.
D．Drink more coffe
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单项选择题
Why is blinking important
A．It helps the eyes absorb eye drops.
B．It helps to keep the eyes moist.
C．It improves a person's concentration.
D．It prevents a buildup of chemicals in the eyes.
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