Before the invention of communication devices, ____

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Before the invention of communication devices, ____.

people gave better care to their local affairs

there was no transportation between countrics

people were much interested in world affairs

people were mostly kept in the dark about the world

Giải thích

Đáp án đúng là: D

Giải thích: "before the invention of communication devices, people were mostly ignorant of what was happening in other parts of the world"

Dịch: people were mostly kept in the dark about the world = con người từng không biết nhiều về thế giới