单项选择题

A．By keeping the files for ten years.
B．By putting the files in the computer.
C．By finding a bigger space.
D．By discarding the files.
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单项选择题
A．It brought Barry a lot of compliments.B．It made the working system worse than before.C．It ensured the normal work of the staff.D．It took six months to get the upgrade working properly.
A．It brought Barry a lot of compliments.
B．It made the working system worse than before.
C．It ensured the normal work of the staff.
D．It took six months to get the upgrade working properly.
单项选择题
According to a new TIME poll, what may be one of the reasons that Americans prefer to buy organic food ant energy-efficient light bulbs
A．These products are cheaper and more persuasive.
B．They are abiding by a kind of new contract.
C．The manufacturer of the products urges them to buy.
D．Buying such products has become a vogue.
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