题目

Food prices are climbing around the world because farmers can't ____ demand for grain． A．catch up with       B．keep up with          C．grow out of   D．put up with 答案：B 解析: catch up with赶上；keep up with跟上；grow out of 出自于；put up with容忍。句子意思是“食品价格在全世界都在上升，因为农民跟不上对谷物的需求。”

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