【译文】他们在一起站着聊天，非常随意。
【解析】表示“尽可能地……”自然用as…as…can be的结构，故首先排除C和D。英语中有as a．as（a．) can be (括号中的形容词可以省略) 的说法，如：Clarity Life phones are as simple as can be．本题与这种句型相当．只是把比较部分改成了副词。故答案是B。另外，英语中也有as…as it Can be的说法；含it的时候， it是指示代词，指代句中前文出现的名词。比如：Now they had everything that they wanted，and everything was as good as it could be．(句中it指代everything)又如：．．．and then，about a quarter of a mile down the lane rose the Vicarage…almost as close to the road as it could be．(Emma，Chapter X，句中it
指the Vicarage)本题中若选A，则it指代不明。