According to the passage, during their presentation, speakers may change their tone of presentation as a result of their perception of _____...

* Hướng dẫn giải

Chọn A.

Đáp án A
Dựa vào dẫn chứng trong đoạn văn “How a speaker perceives the listener’s receptiveness, interest, or sympathy in any given conversation can drastically alter the tone of presentation, by encouraging or discouraging the speaker.”