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---Wouldyouliketohaveacigarette?---Nothanks.ItisthreeyearssinceI.A.havebeguntosmokeB.smokedC.begantonotsmokeD.hadsmoked

题目详情

  ---Would you like to have a cigarette?

---No thanks. It is three years since I _______.

A. have begun to smoke            B. smoked

C. began to not smoke              D. had smoked

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B