I began to fish before memory began, I know I have always fished.
A. so far
B. so as far as
C. as far as
D. so
网友回答
A. so far
(答案→)B. so as far as
C. as far as
D. so
解析：本题中逗号前是一个主从复合句，后面也是主从复合句，因此其间需要一个并列连词，so 是并列连词，B，D两项中有so,如果选D，I know后面的部分成了宾语从句，不符合题意。而B项的so连接两个分句，as far as为I know的从属连接词，故B为正确答案。