operate their own networks and exchange traffic with (27) other based on voluntary interconnection agreements.

Câu hỏi :

operate their own networks and exchange traffic with (27) ______ other based on voluntary interconnection agreements.


A. another   


B. every                

C. each                 

D. all

* Đáp án

C

* Hướng dẫn giải

Giải thích: each other: lẫn nhau
Chọn C

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