-What are you going to do this afternoon?-I will probably go

选B
What are you going to do this afternoon?-I will probably go for a walk later on so long as it stays fine
今天下午你打算干什么?如果天气一直晴的话,我可能过会儿去散散步.
as far as 用于指距离,表示“直到……为止”之意时
so long as 只要,如果 ,既然
even if 1.即使;纵然;虽然 2.甚至,即使 3.即使,尽管
as though犹如;好像