This has gone on long

This has gone on long This has quite simply gone on long enough.如何理解、如何翻译? He (has gone to) Shanghai on business 为什么是How long has he been there 而不是How long has he gone there How long has he _ Beijing?A gone to B gone C been in D been THIS animai has fur andfour long This hard-working student has gone to Oxford University for Yesterday is gone and tomorrow has not arrived this is this CD has expired on her husband has gone london on business【英译汉】 1.My father has gone to Beijing on b________ The food ____ on the ground has gone bad .