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問題詳情:

 Ifallbusinessgoespaperless,atleastonemilliontonsofpape...

 If all business goes paperless, at least one million tons of paper will be           a year.

   A. used                   B. saved                       C. copied                      D. offered

【回答】

B

知識點:動詞和動詞短語

題型:選擇題

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