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    We are worried about they can be rescued. A. that B. whether C. if D. what 【查看更多】

     

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    We are worried about ____ they can be rescued.

    A.      that  B. whether  C. if  D. what

     

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     We are worried about ____ they can be rescued.

      A. that  B. whether  C. if  D. what

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