这个贴果然有生命力。 新问:大全解释中说E选项改变了句子重心,在这里是说all kinds of paper 改变了原文中paper of all kinds,使得重心变化,还是说because和so的不同导致重心变化。 (A) Because paper of all kinds is the biggest single component of municipal trash, many municipalities have tried recycling to reduce the cost of trash disposal. (E) All kinds of paper is the biggest single component of municipal trash, so many municipalities have tried to recycle so that the cost of trash disposal could be reduced. 因为读完选项之后总觉得because强调原因,so强调结果,不知道这个是否正确或者有什么依据没有。恳请众NN解惑。