填空题

（）(use) economically, one tin of oil will last at least two months.

【参考答案】

Used

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单项选择题

A．Saying good-bye to a friend.
B．Buying tickets for a sports event.
C．Paying a bill at a friend.
D．Arranging a plane trip.

填空题

How would you feel if you tell the same story again and againYou may feel（）telling the same story.