I have（ ） the library for about several hours.（left / left f

I have（ ） the library for about several hours.（left / left f Mr.Smith ___here for about two hours.A.has left B.left from we still have two hours left.为什么用left I have few left 句中的left I left my room two hours ago.(同义句） I have talked with the student on the left for half an hour 英语翻译I apologize for not informing the Office before I left f i have （been away/left） my home for three years.两种我都见过!left为 英语翻译I have left the end of our love affair,To the hands of f I will have left for America by the time he arrives English books about Chinese Culture for Sale.I have several the manager left two hours ago.the manager____ ____ ____ for