He has been worked hard ___his lessons.用at还是in啊?

he has worked at...和he has been worked at..有什么区别?哪个对呢? He works in China,but he___in Africa for 8 years.A.work B.has worked C.had worked D.has been workingA选项写错了，应该是worked. Jim ____ here since he came here.A.has been working B.works C.had worked D.worked He has worked in the company for 15 years.H ( ) ,he,doesn~t He has been worked hard ___his lessons.用at还是in啊? has been worked和has been working的区别 he()in the laboratory the whole morning.A.has been working ,B.is working,c.has worked By next year he ---in New York for five years.A has worked B has been working C works D will have worked 现在完成时是have/has+过去是吗?he has worked here two years?he has been here for two years?一个是主动一个是被动? Tom was tired.He _______ all day.A was working B.has worked C worked ,Dhad been working分析一下原因 翻译 It's five years since he smoked It has been 2 years since we worked here he ( )there for a few months and then went to America,填worked 还是has been working Mr.white works as a journalist at present,but he ___in a high school for several yearsA.has worked B.worked C,had worked D.has been working 请详细说明为什么 He has already worked for() hour. He has worked there (s) last year 第8题,选项是A.has been worked B.has been workingC.has第8题,选项是A.has been worked B.has been workingC.has work D.worked. 求答案即解析. i first met Tom 10 years ago.he __in a radio factory at that time?A had worked B has worked Cwas working D has been working选什么啊 为什么啊 long has he been away?