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    ---Why are you so late? ---The bus was for an hour because a tree had fallen across the road. A. held out B. held on C. held back D. held up 【查看更多】

     

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     ----Why are you so late ?

       -----The bus was ____for an hour because a tree had fallen across the road.

       A. held up    B. held on      C. held back      D.  held out

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