1.[单选题]___________________.
A.By covering the credit card with a layer of plastic.
B.By calling the credit card company for confirmation.
C.By seeking help from the card reader maker Verifone.
D.By typing the credit card number into the cash register.
2.[单选题]
___________________.
A.The card got damaged.
B.The card was found invalid.
C.The card reader failed to do the scanning.
D.The card reader broke down unexpectedly.
3.[单选题]_________________.
A.Affect the sales of high-tech appliances.
B.Change the lifestyle of many Americans.
C.Give birth to many new technological inventions.
D.Produce many low-tech fixes for high-tech failures.