Bộ 10 đề ôn thi học sinh giỏi Tiếng anh 9 năm 2023 có đáp án (Đề 6)

It was hard to …………………………………between the two styles of music.

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It was hard to …………………………………between the two styles of music.

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Giải thích

It was hard to differentiate between the two styles of music.