( )How long has your faher been a worker?A.In 1990 B.for 1990 C.s_英语解答

( )How long has your faher been a worker?A.In 1990 B.for 1990 C.since1990 D.since 20 years

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解答

选C,百分百正确
how long提问用since+年代,或者for+年限来回答.