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        1. ____ the help of experienced career instructors, this type of job-hunting training ____ to be very efficient.
          A.By; has provedB.With; has provedC.Under; is provingD.With; is proved
          B
          本題主要考查固定搭配的識記及動詞的語態(tài)。根據(jù)help的搭配要求,介詞須用with,從而排除選項A、C;動詞prove表示事物的性質(zhì)時,為不及物動詞,不用被動形式,于是本題的正確答案為B。
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