Thanks to the invention of the mobile phone people can now keep inwith each other quite ea

问题补充：

Thanks to the invention of the mobile phone，people can now keep inwith each other quite easily．

A. relation

B. union

C. touch

D. connection

答案：

A. relation

B. union

(答案→)C. touch

D. connection

解析：可联系答.案.网客服索取。

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