单项选择题

A．An unhealthy diet.
B．Irregular periods of sleep.
C．Sitting too long surfing the Internet.
D．Using good monitors.
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单项选择题
A．By working overtime to earn the money.B．By borrowing money from a bank.C．By relying on her savings.D．By accepting help from her parents.
A．By working overtime to earn the money.
B．By borrowing money from a bank.
C．By relying on her savings.
D．By accepting help from her parents.
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