你选E的话改变了句子的中心意思。原句的核心是more than 300 rivers drain into Siberia's Lake Baikal,后面的那些全是修饰Siberia's Lake Baikal的,不是重点。但是E的句子核心是Siberia's Lake Baikal holds 20 percent of the world's fresh water.两句话你再多读两边体会一下。
-- by 会员 cynthia1991 (2011/9/18 23:05:06)
谢谢,我开始没看好,觉得A没主语