摘要： Butterflies a sweet liquid produced by flowers, which bees and other insects collect. A. carry on B. feed on C. put on D. focus on
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Butterflies________a sweet liquid produced by flowers，which bees and other insects collect.????????????? ????????????? ????????????? ????????????? ????????????? ????????????? ????????????? ????????????? ????????????? ????????????? ????????????? (2013·湖北，25)
A．carry on? B．feed on
C．put on D．focus on
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