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    - Where’s Mary? - I think she in the library. You know she never wastes time. A. has gone B. has been C. is studying D. will stay 【查看更多】

     

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    —Where's Mary?

    —I think she ________ in the library.You know she never wastes time.

    A.has gone to　　 B.has been to

    C.is studying　　　　 D.will stay

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