问题
选择题
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
答案：B
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。”