Although improved efficiency inconverting harvested trees into wood products may reduce harvest rates, it willstimulate demand by increasing supply and lowering prices, thereby boosting consumption.
A. in converting harvested trees into woodproducts may reduce harvest rates,it will stimulate demand by increasing supply and lowering prices, therebyboosting
B. in converting harvested trees into woodproducts may reduce harvest rates,demand will be stimulated because of increasing supply and lowering prices, which boost
C. of converting harvested trees into woodproducts may reduce harvest rates, it will stimulate demand by increasingsupply and lowering prices, whichboosts
D. of harvested trees being converted into woodproducts may reduce harvestrates, it will stimulate demand, because it will increase supply and lower prices, thereby boosting
E. when harvested trees are converted into woodproducts may reduce harvest rates, demand will be stimulated because ofincreasing supply andlowering prices, which boost
我选的是A
B有中心转移的问题（从efficiency转成了demand）和which指代不清的问题
个人理解，没有定论的话好难受啊.. | 
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发表于 2010-12-1 01:07:41
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