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    23．Nowadays, many people often have conversations with friends in the same city over telephone, while keeping in touch with friends in other cities by e – mail. A．/; the B．/; a C．the; / D．the; a 【查看更多】

     

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    Nowadays, many people often have conversations with friends in the same city over       telephone, while keeping in touch with friends in other cities by         e – mail.

    A．/; the                          B．/; a                      C．the; /                   D．the; a

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