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 phon

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单项选择题

A. Every flight departs in the morning.
B. Two flights go to the same country.
C. All flights arrive in the afternoon.

填空题

Mobile phone sales fell in May but rose again in June to reach the same level as in April.（）

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