1. 坚持下去：48. I'm single. 我是单身贵族. | 49. Keep it up! 坚持下去! | 50. Let me see.让我想想.

2. 保持下去：48. I'm single. 我是单身贵族. | 49. Keep it up! 保持下去! | 50. Let me see.让我想想.

3. 继续努力：That's quite an improvement. 提高很大了. | Keep it up! 继续努力! | I've never seen anyone do it better. 我还没见过比你做得更好的.

4. 坚持：keep in touch with 与...保持联系 | keep it up 坚持 | keep on 继续进行,反复地做