单项选择题

If at anytime you wish to cancel your subscription, notify us in writing.If you want to cancel the subscription,

A. you should send them a written notice.
B. you can only make it at a specified period.
C. you can contact them by phone.
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单项选择题
Some people think Mr Murdoch is crazy because
A. he is often motivated to change.
B. he is in the media business.
C. he often makes unreasonable decisions.
单项选择题
A． before B． during C． within
A． before
B． during
C． within
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