He was admitted into Beijing University and years of his hard work____ eventually .
A.paidoffB.werepaidoffC.hadpaidoffD.hadbeenpaidoff...
A.paid off B.were paid off C.had paid off D.had been paid off
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B
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C
前面过去式,发生在过去的过去用过去完成时
前面过去式,发生在过去的过去用过去完成时
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