Bộ 10 đề ôn thi học sinh giỏi Tiếng anh 9 năm 2023 có đáp án (Đề 1)

According to ……………..………….., most people sleep less than 8 hours every day.

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According to ……………..………….., most people sleep less than 8 hours every day.

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Giải thích

According to research, most people sleep less than 8 hours every day.