16.He has worked in this school for many years,_______ he?A.has B.hasn’t C.is D.isn’t为什么选A,而不是B,前面肯定,后面不应该否定吗?

-How long has his father worked in that city?-he has worked there s___ last year. 修改病句:He has worked in Benijing last year. He said he ( ) in that factroy since 1949.A.has worked B.had worked C.worked D.was working How long has he worked in the radio studio? Can you tell me.合并成宾语从句是he had worked 还是he has worked说明一下理由 Mr Smith has worked in this factory since he ( )to China A.has moved B.moved =Mark ____ in China for 10 years and now he teaches Chinese in Britain.A.has worked B.worked Mark ____ in China for 10 years and now he teaches Chinese in Britain.A.has worked B.worked 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. He has worked in the company for 15 years.H ( ) ,he,doesn~t So hard has he worked in the past few months that he has made great progress in English翻译汉语 Mark _________ in China for 10 years and now he teaches Chinese in Britain.A.has worked B.worked C.had worked D.is working In the past three years ,he ____ very hard at maths. A.works B.worked C.has worked Dis workin Jim ___ in Zhuzhou since he finished his college.A.works B.is working C.has worked D.is worked He worked in an office. Mark_in China for 10 years and now he teaches Chinese in Britain 请说明理由 回答其他答案忽略A、has worked B、worked C、had worked LiLei has bought his car since he worked in this company.这个句子对吗? he has worked in the factory_____five years ago 1.for 2.at 3.since 4.about John　has　worked　as　a　sales　manager　since　he　（join）____this　company　in　2002.