单项选择题

What can be inferred about Tom

A．He has been working for a long time.
B．He doesn't know how to use a computer.
C．He doesn't want to write the paper.
D．He needs to get an office jo
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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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