练习：
1.Paragraph 3 ______________
2.Paragraph 4 ______________
3.Paragraph 5 ______________
4.Paragraph 6 ______________
A.The Cost of Convenience
B.A Surprising Answer Given by the Economists
C.The Effect of Inflation
D.Middlemen's Limited Share in the Additional Profit
E.Farmers' Denial of Increased Profit
F.Housewives' Need to Find Jobs
5.Many people agree that food prices have increased sharply but they have failed _____________.
6.The farmers have not been benefited very much ______________.
7.Housewives have to pay for the time they save ______________.
8.The economists have come to the conclusion that the cause of increased food prices lies in ________________________.
A.Nor have the middlemen
B.to increase the prices for food
C.that they cannot agree on the causes of the increase in prices
D.to agree on the reasons for the increase
E.by buying prepared food
F.the popularization of convenience food
词汇：
average /'aevsnds/ adj.一般的，普通的 sharply /'Jaipli/ adv.明显地 cheese /tjiiz/ n.奶酪 process / 丨prauses/ v.力卩工 package /'paebds/ v.包装
注释：
…… the vegetables,fruit,meat,eggs,and cheese that stores offer for sale.?"???商店销售的蔬 菜、水果、肉类和奶酪等。
dessert /di'z3it/ n.甜点 spread /spred/ n.(生产成本和卖价的)差额 traceable /'treissbl/ adj.可追溯的 transfer /traens'f3：/ v.转移
the jump in food prices：食品价格的猛涨。这里的jump是名词，意为"猛烈地往上跳跃"。
3.Some of the basic reasons for widening food price spreads are easily traceable to the increasing use of convenience foods.造成食品生产成本与卖价间差额的扩大，一些根本原因可以追溯到 人们越来越多地食用方便食品上面。