翻译One I have known a very long time

翻译One I have known a very long time 翻译英语小短文!Human beings have used tools for a very long time. I 句子I knew him for a long time为什么不用 have known用knew? Have you known Jessie for a long time?Yes,since 英语翻译翻译One should examine oneself for a very long time before I think I am very good,but suddenly found a long time have n Have you known Dr.Jackson for a long time?Yes,since she join 英语阅读,Doctors have known for a long time that extremely loud 英语翻译We have known for a long time that flowers of different Have you known Dr.Jackson for a long time?Yes,since she ___t 英语问题9道1、---Have you known Dr.jackson for a long time?\----Ye 27.—Have you known Dr Jackson for a long time?—Yes,since she