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        1. Today, we _____ work as hard as people did in the past.
          A.mustn’tB.can’tC.shouldn’tD.don’t have to
          D
          本題考查情態(tài)動詞的含義。本題的含義為如今我們沒有必要向過去的人們那樣努力工作。don’t have to表示沒有必要做某事的含義,符合本題的句意;而mustn’t的含義為不準,can’t為不可能的含義,shouldn’t為不應該的含義,后三者與本句的意思不符,故本題選D。
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