单项选择题

When the "free trial" deadline is over, you'll be charged without notice for a product or service if ______.

A．you fail to cancel it within the specified period
B．you happen to reveal your credit card number
C．you find the product or service unsatisfactory
D．you fail to apply for extension of the deadline
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单项选择题
Businesses do not regard information concerning personal bank accounts as private because ______.
A．its revelation will do no harm to consumers under the current protection policy
B．it is considered "transaction and experience" information unprotected by law
C．it has always been considered an open secret by the general public
D．its sale can be brought under control through self-regulation
单项选择题
Contrary to popular belief, the author finds that spying on people's privacy ______.
A．is mainly carried out by means o{ secret taping
B．has been intensified with the help of the IRS
C．is practiced exclusively by the FBI
D．is more prevalent in business circles
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