Ai giúp em với ạa • Sắp xếp câu 1. takes place / of February / and lats 10 days / at the beginning / each year / the festival 2. are responsible / for / some scientists / mobile phones / some health problems / believe that /./ • Biến đổi câu ( trans ) 3. We haven't use these machines for a long time -> It's been... 4. Hoa is the best tennis player in the club -> Noone else in the club can... 5. It's a pity they are traveling on uncomfortable buses -> They wish they... • Wf 6. My sister spends all her free time _________ her own room ( decorate )

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