单项选择题

John, I haven't had a chance to phone Bill. Have you Liz

A．Liz has tried unsuccessfully to phone Bill.
B．Liz is asking John to phone Bill.
C．Liz has been too busy to phone Bill.
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The machine company empties the money from the machine as part of its service agreement.
A．A．Right
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How many bytes of information can Tapestore store
A．A．500 million
B．B．4.5 billion
C．C．480,000
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