Butterflies ______ a sweet liquid produced by flowers, which bees and other insects collect.
A．carry onB．feed onC．put onD．focus on
B
句意：蝴蝶吃由花產(chǎn)生的甜的液體，這種液體是由蜜蜂和其他昆蟲(chóng)的收集的。carry on“進(jìn)行，開(kāi)展，經(jīng)營(yíng)”；feed on“以…為食”；put on“穿戴，上演，舉辦，播放”；focus on“致力于，使聚焦于，使直射于，(使)集中”。
【考點(diǎn)定位】考查動(dòng)詞短語(yǔ)的意義。
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