单项选择题

A．Separating different types of garbage.
B．Disposing of trash properly.
C．Having a family clean-up party.
D．Saving water whenever using it.
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单项选择题
A．She was returning home from a party.B．She was taking her time in the street.C．She just got off work when she saw the UFO.D．She was driving home from a restaurant.
A．She was returning home from a party.
B．She was taking her time in the street.
C．She just got off work when she saw the UFO.
D．She was driving home from a restaurant.
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