they have worked in the factory for three years,（对划线部分提问)how many have they worked in the factory?但是答案用的是how many呀？所以我有点想不通，答案是不是错的啊

I could hardly see anything () the dense fog.(since for)They have worked in this company () they graduated.(since for) They worked in a company ___made computers. they have worked in the factory for three years,（对划线部分提问)how many have they worked in the factory?但是答案用的是how many呀？所以我有点想不通，答案是不是错的啊 They worked in a hospital last year.(改为否定句) 第一句：David worked in this city years ago【改为同义句】第二句：They have lived there since〔 1995〕对扩号内提问 英语哦—Few people in his company have been abroad,__________ they?—Yes,most of them have ever worked in foreign countries.A.do B.don’t C.have D.haven’t have you ever worked in a company与have you worked in a company有什么区别, Mr.White and his wife worked on a farm in America.……阅读理解Mr.White and his wife worked on a farm in America.They worked very hard .One day Mr.White said to his wife,“ Dear ,Let’s go to New York next Sunday.We can have a good time there They worked very h___ -Have you __ worked in a company -Of couse.I worked in a radio company __ four years. _____ hard before, Tom is afraid of failing in the exam. A. Having been worked B. Not to have worked C. Having never worked D. Never have worked为什么选C而不可以用Never having worked He employed over seven hundred people____.A.They worked for him B.He worked for them C.They employed him D.They were in charge they worked in the company in 2000用since改写they ___ ____ in the conpany since 2000. in order to finish (the) work in time ,they worked ( ) day and( )night.这么填对吗 中文翻译 they have worked out most carefully the time and money needed to complete the project. Most have worked their way up from sales representatives,and they are very pround of 英语翻译have i worked? I ( )in the factory for over one year A.work B.worked C.have worked D.was working