发贴：colo_feng 听力 ，旧题目！阅读：第一篇，第二篇，cost of food! 大概说，人类生产food的成本，如果加上其他因素，such as环境牺牲等， 实际的成本是很高的！等等！第3。说海岸的cruption.作文， table about house work in the UK. females and males spent different amount time on that! Task two: computers less helpful to children's study. and some people say computers have a negitive effect on children's physical and mental development. disagree or agree?