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    It about twenty years since CCTV to broadcast English programs. A. is; began B. has been; begun C. is; has begun D. was; began 【查看更多】

     

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    It _____ about twenty years since CCTV ____ to broadcast English programs.

    A．has been; begun

    B．is; began

    C．is; has begun

    D．was; began

     

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     It _____ about twenty years since CCTV ____ to broadcast English programs.

    A. has been; begun     B. is; began    C. is; has begun     D. was; began

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