it is only a w_____ of time to speak to her.填什么?
问题描述：
it is only a w_____ of time to speak to her.填什么?
答
答案是：waste
句意：和她说话只不过是浪费时间.
解析：a waste of time即浪费时间的意思.only在这里只是加强语气,不属于特殊语法.
补充知识：it's a waste of time to do sth.意思是做什么事纯属浪费时间（这件事还没有实际发生）.it's a waste of time doing sth.意思也是做某事纯属浪费时间（这件事已经做过）.