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
网友回答
A. catch up with
(答案→)B. keep up with
C. grow out of
D. put up with
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。”