Tìm lỗi sai và chữa lại cho đúng, nêu lý do: The assumption (that) smoking has bad (effects) (on) our health (have been proved). (rock music) was (original) a mixture of country (music) and rhythm (and) blues

Tìm lỗi sai và chữa lại cho đúng, nêu lý do
1. The assumption (that) smoking has bad (effects) (on) our health (have been proved)
2. (rock music) was (original) a mixture of country (music) and rhythm (and) blues
3. wind is a motion (that occurs) when (lightest) air rises and (cooler) heavier replace (it)