By the snowstorm was ended,there was nearly nothing left on the farm.去掉was；was→had been；ne

网友回答

(答案→)去掉was；was→had been；nearly→almost 
解析：ended此处指snowstorm的自然停止状态，并不是人为的动作，所以要用作不及物动词；by与时间名词连用时，时态为完成时；nearly后面不接否定词。