Butterflies________a sweet liquid produced by flowers，which bees and other insects collect.                                                             (2013·湖北，25)
A．carry onB．feed on
C．put on D．focus on
B
解析　句意為：蝴蝶以花中的一種甜蜜的液體為主食，這種液體也是蜜蜂和其他昆蟲(chóng)要采集的。A項(xiàng)意為“經(jīng)營(yíng)；繼續(xù)”；B項(xiàng)意為“以……為主食”；C項(xiàng)意為“穿上；上演”；D項(xiàng)意為“致力于……；對(duì)……注意”。由句意可知答案為B項(xiàng)。
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