【正确答案】:
THE AFTERNOON SUNSHINE, WHICH SPREAD LIKE WATER, DISPELLED THE MIST IN THE FOREST. 
【题目解析】:本题考查非限制性定语从句的用法。spread like water的主语是前面的 The afternoon sunshine,且从句前面有一个逗号,所以这里要用which引导从句。
THE AFTERNOON SUNSHINE, WHICH SPREAD LIKE WATER, DISPELLED THE MIST IN THE FOREST.