有没有变化格式要求?否则很多种答案啊,如： = Fish won't be able to live without water.= If there is no water, fish can't live.= If there were no water, fish couldn't live.（此变化采用了虚拟语气）= ....fish can’tlive —— —— —— ——water。 四个空准确答案是：if there isn't any 或 if there is no