雅思口语范文：Most important invention 2016-02-29 | 分类：英语常识 | 浏览:1999 Describe the most important invention before the computer. You should say: W
雅思口语范文：important invention 2016-02-29 | 分类：英语常识 | 浏览:1999 Describe the most important invention before the computer. You should say: W
