题目内容：

Mr.Yang was reading his book in the office,completely_to the world.为什么填lost,不填losing

优质解答

lose的过去分词lost做伴随状语,也就是前面和后面,这两个分句的动作是同时进行的（伴随状语的条件）把前面省略的部分加上,你就看得更加明了了.Mr. Yang was completely lost to the world.lost是lose的过去分词,可以...